pV OFF gRID - Iris Hellas

ENGLISH

pV OFF gRID

www.steca.com

Content

4 SteCa

7 ProduCtS

8 Solar charge controllers8 Basic 11 Classic 16 advanced

23 Sine wave inverters

33 Voltage converters

34 Solar refrigerator / freezer

36 energy-saving lights

38 accessories

47 SyStem oVerView

48 Solar home systems

50 night light systems

52 inverter systems

54 Hybrid systems

60 Additional systems 60 Steca Solsafe

62 Steca‘s charging technology

64 The right choice 64 Solar charge controllers 66 mPPt charge controllers 68 inverters

71 otHer ProduCt areaS

two billion people in rural areas still have no access to an electricity grid. Steca has set itself the target of improving the quality of life of these people. to this end, Steca develops and manufactures top-quality products which, thanks to their long lifetime, ensure extremely low costs.

»CaPture tHe Sun‘S energy uSing intelligent SyStemS from SteCa.«

ExplAnATion of SymbolS for inSidE pAgES

Solar home system This device is particularly suitable for solar home systems.

Inverter system This device is suitable for applications of higher performance classes or for supplying entire villages.

Hybrid system Suitable for hybrid systems in which additional generators are used.

Night light function This device is suitable for night light systems.

Uninterruptible power supply This device can also charge the battery from an external AC source.

SOC This device calculates the state of charge of the battery.

Telecom This device is specially suitable for all kinds of telecommunication applications.

Remote monitoring This device can transfer data using wires, telephone cables or wirelessly.

Sea water This device is particularly protected against moisture and corrosion.

6720 W Solar module performance Maximum input power of the connected solar modules.

LCD display This device has a digital display which allows different system information to be shown.

Camping This device is particularly suitable for use in mobile homes or for camping applications.

Energy efficiency class This device is highly energy efficient – highest qualification A+++.

Exclusion of liabilitySteca Elektronik GmbH reserves the right to supplement and change the product range offered in the catalogue, or to remove products from the range. Please contact Steca if you require additional or more up-to-date product information. The information in this catalogue is not exhaustive. We compiled this information with care. In spite of this, it may not have been updated or may no longer be applicable in individual cases. We accept no liability for imprecise or missing information in this catalogue.Copyright Steca Elektronik GmbH („Steca“). Steca is a protected trademark of Steca Elektronik GmbH. This trademark may only be used by third parties with our express prior permission. The sole owner of the rights to the images and logos and texts is Steca. Steca allows the free use of product pictures and graphics in the context of the presentation of its own products, as long as neither product pictures nor graphics are altered or edited, in particular with regard to cropping, modification, distortion or other deformations. The permission of Steca must always be gained for any other commercial use. „Steca Elektronik GmbH“ must always be indicated as the source of the images. In return for the provision of the pictures free of charge, Steca requests a sample copy when they are used in print media, and a brief notification when they are used in film and electronic media. You agree that this agreement does not require a signature in order to become valid. The pertinent laws of the Federal Republic of Germany apply for the use of this catalogue by third parties and the use of the corres ponding terms and conditions.Images from Steca, www.burger-fotodesign.de, www.fotothanner.de, www.photocase.com, www.marx-studios.de, www.fotolia.com, www.istockphoto.com.

2 33

www.steca.com

»we are tHinking of tomorrow.«

Services and production have an ecological future at the memmingen electronics specia- list company Steca. the company makes a worldwide contribution to reducing power consumption and allowing alternative ener-gy sources to be used efficiently by provi-ding high-performance products.

Steca has established a wide base in order to achieve these goals. the company offers electronic services for residential, automo- tive, agricultural, environmental, traffic and building technology and also for the indus-trial and medical sectors. the company also develops products for the environmentally friendly use of solar energy under the brand name of Steca. Steca elektronik is one of the few manufacturers that cover all three seg-ments of the solar market: PV grid feeding

systems, off-grid PV systems and solar ther-mal systems. Steca also produces battery charging systems that extract the maximum potential from the energy storage system.

Steca sets a good example in its own pro-duction methods: the company uses only manufacturing processes that conform to strict ecological criteria. Steca is actively in-volved in research projects for efficient ener-gy use and climate protection. the german federal government therefore listed Steca as an authority for energy generation in the environmental technology atlas „green tech made in germany“.

Steca‘s environmental policy is based on sustainability and environmental compati-bility, with a view to providing services and producing products for an ecological future.

the company considers the whole value-added chain from this perspective and also involves its suppliers and customers. Steca is certified in accordance with iSo 14001:2004 and organised in accordance with the eu environmental management and audit Scheme.

Environmental protection in series »Simple business processes, fair partnerships

and transparent communication contribute to our joint success.«

Full power for you: Management board Peter and Michael Voigtsberger

54 tHe ComPany tHe ComPany

www.steca.com

as a central control element in off-grid photovoltaic systems, Steca solar charge controllers control the entire energy flow while ensuring optimal battery maintenance. the products developed and manufac-tured by Steca ensure extremely low costs due to their long service lives. Steca solar charge controllers and sine wave inverters are the best choice for a modern and professional power supply – all over the world.

»growtH BaSed on reliaBility – in uSe all oVer tHe world.« ProduCtS

Solar charge controllers

Sine wave inverters

Voltage converters

Solar refrigerator / freezer

Energy-saving lights

Accessories

7 ProduCtS

145

100

305

87

135 5

4x ø4

6 A...10 A

NIgHT-LIgHT*

MAD

E IN

GER

MAN

Y

187

96

45

177 5

1660

4x ø5

10 A...30 A

www.steca.com

Steca Solsum F6.6f, 8.8f, 10.10fthe Steca Solsum f-line continues the huge success of one of the most used SHS controllers. with a power range of up to 10 a at automatically recognized 12 V or 24 V it fits to a system sizes of maximum 240 w.

full circuit board protection with led display for simple recogni-tion of battery status. Various connections make it possible to con-nect easily to solar panels, battery and load. the Steca Solsum f works on Pwm as a low loss series controller.

product features ∙ Series controller ∙ Voltage regulation ∙ automatic detection of voltage ∙ Pwm control ∙ multistage charging technology ∙ Current compensated load disconnection ∙ automatic load reconnection ∙ temperature compensation ∙ Common positive grounding or negative grounding on one terminal

∙ monthly maintenance charge

Electronic protection functions ∙ overcharge protection ∙ deep discharge protection ∙ Reverse polarity protection of module (≤ 36 V), load and battery ∙ automatic electronic fuse ∙ Short circuit protection of load and module ∙ overvoltage protection at module input ∙ open circuit protection without battery ∙ reverse current protection at night ∙ overtemperature and overload protection ∙ load disconnection on battery overvoltage

displays ∙ multifunction led display ∙ multi-coloured led ∙ 4 leds show operating states

~ for operation, state of charge, fault messages

options ∙ night light function pre-set in the factory or adjustable via Steca Pa rC 100

∙ Parameterisation of function values via Steca Pa rC 100

Certificates ∙ Compliant with European Standards (CE) ∙ roHS compliant ∙ made in eu ∙ developed in germany ∙ manufactured according to iSo 9001 and iSo 14001

Steca Solarix pRSprS 1010, prS 1515, prS 2020, prS 3030the simplicity and high performance of the Steca Solarix PrS solar charge controller make it particularly appealing. at the same time, it offers a modern design and a convenient display, all at an extremely attractive price.

Several leds in various colours emulate a tank display, which gives information on the battery‘s state of charge. Here, Steca’s latest al-gorithms are employed, resulting in optimal battery maintenance. the Solarix PrS charge controllers are equipped with an electronic fuse, thus making optimal protection possible. they operate on the serial principle, and separate the solar module from the battery in order to protect it against overcharging.

for larger projects, the charge controllers can also be equipped with special functions: e.g. with night light function and selec-table charging plateau and deep-discharge protection voltages.

product features ∙ Series controller ∙ automatic detection of voltage ∙ Voltage regulation ∙ Pwm control ∙ multistage charging technology ∙ Current compensated load disconnection ∙ automatic load reconnection ∙ temperature compensation ∙ Common positive grounding or negative grounding on one terminal

∙ monthly maintenance charge

Electronic protection functions ∙ overcharge protection ∙ deep discharge protection ∙ Reverse polarity protection of module (≤ 36 V), load and battery ∙ automatic electronic fuse ∙ Short circuit protection of load and module ∙ overvoltage protection at module input ∙ open circuit protection without battery ∙ reverse current protection at night ∙ overtemperature and overload protection ∙ load disconnection on battery overvoltage




∙ Parameterisation of function values via Steca Pa rC 100

Certificates ∙ Compliant with European Standards (CE) ∙ roHS compliant ∙ made in germany ∙ developed in germany ∙ manufactured according to iSo 9001 and iSo 14001

6.6f 8.8f 10.10f

Characterisation of the operating performance

System voltage 12 V (24 V)

own consumption < 4 ma

dC input side

open circuit voltage solar module < 47 V

module current 6 a 8 a 10 a

dC output side

load current** 6 a 8 a 10 a

Reconnection voltage (LVR)* 12.4 V … 12.7 V (24.8 V … 25.4 V)

Deep discharge protection (LVD)* 11.2 V … 11.6 V (22.4 V … 23.2 V)

battery side

end of charge voltage* 13.9 V (27.8 V)

Boost charge voltage* 14.4 V (28.8 V)

Set battery type* gel

operating conditions

ambient temperature -25 °C … +50 °C

fitting and construction

Terminal (fine / single wire) 4 mm2 / 6 mm2 - awg 12 / 9

degree of protection iP 32

Dimensions (X x Y x Z) 145 x 100 x 30 mm

weight approx. 150 g

* adjustable via Steca PA RC100 Technical data at 25 °C / 77 °F** Inverters must not be connected to the load output.

prS 1010 prS 1515 prS 2020 prS 3030



own consumption < 4 ma

dC input side


module current 10 a 15 a 20 a 30 a

dC output side

load current** 10 a 15 a 20 a 30 a

Reconnection voltage (LVR)* 12.4 V … 12.7 V (24.8 V … 25.4 V)

Deep discharge protection (LVD)* 11.2 V … 11.6 V (22.4 V … 23.2 V)

battery side

Battery voltage 9 V ... 17 V (17.1 V ... 34 V)



equalisation charge* 14.7 V (29.4 V)

Set battery type* liquid







weight 345 g

* adjustable via Steca PA RC100 Technical data at 25 °C / 77 °F** Inverters must not be connected to the load output.

Steca pa RC100Remote control(page 39)

Steca pa RC100Remote control (page 39)

8 9 Solar CHarge ControllerS Solar CHarge ControllerS

areas of application: areas of application:

900 Wp300 Wp

187

153

115

15

177 5

68

4x ø5

10 A...20 A

90

91

92

93

94

95

96

97

98

99

100

100755025

12 V

24 V

η [%]

Power [% of the rated power]

MAD

E IN

GER

MAN

YM

ADE

IN G

ERM

ANY

33

146

9080

136

5

5

2x ø4

3 A...5 A

www.steca.com

Steca Solarix mppTmppT 1010, mppT 2010Steca Solarix mPPt is a solar charge controller with maxi mum Power Point tracking. it is specially designed to work with all established module technologies and is optimized for solar systems with module voltages higher than the battery voltage. the Steca Solarix mPPt is especially qualified in combination with grid tied solar modules. the advanced mPP-tracking algorithm from Steca assures that the maximum available power of the solar generator is charged to the batteries. the Steca Solarix mPPt with latest technology ensures full performance in all conditions, a professional battery care combined with modern design and excellent protection.

product features ∙ Maximum Power Point Tracker (MPP tracker) ∙ Voltage and current regulation ∙ Pwm control ∙ Current compensated load disconnection ∙ automatic load reconnection ∙ temperature compensation ∙ monthly maintenance charge

Electronic protection functions ∙ overcharge protection ∙ deep discharge protection ∙ reverse polarity protection of module, load and battery ∙ reverse polarity protection by internal fuse ∙ automatic electronic fuse ∙ Short circuit protection ∙ overvoltage protection at module input ∙ open circuit protection without battery ∙ reverse current protection at night ∙ overtemperature and overload protection ∙ load disconnection on battery overvoltage




∙ Parameterisation of function values via Steca Pa rC 100 ∙ external temperature sensor


Steca pa RC100Remote control (page 39)

Steca pa TS10External temperature sensor(page 45)

Steca pRpr 0303, pr 0505the Steca Pr 0303 and Pr 0505 solar charge controllers are optimal-ly suited for use in small solar home systems with module currents up to 5 a.

a 75 wp module can be connected, which easily allows operation of lamps, radios and a small television. all loads can be switched off using the manual load switch on the controller. the extremely low own consumption makes the Steca Pr especially suitable for profes-sional applications in telecommunications and traffic management technology. Since this is a serial controller, it is extremely flexible in the type of power source that can be connected. the electronic fuse makes the controller completely maintenance-free and robust.

product features ∙ Series controller ∙ Voltage regulation ∙ Pwm control ∙ multistage charging technology ∙ Current compensated load disconnection ∙ automatic load reconnection ∙ temperature compensation ∙ Common positive grounding or negative grounding on one terminal

Electronic protection functions ∙ overcharge protection ∙ deep discharge protection ∙ reverse polarity protection of module, load and battery ∙ automatic electronic fuse ∙ Short circuit protection of load and module ∙ overvoltage protection at module input ∙ open circuit protection without battery ∙ reverse current protection at night ∙ overtemperature and overload protection ∙ load disconnection on battery overvoltage

displays ∙ multi-coloured led ∙ 3 multi-coloured leds show operating states


operation ∙ manual load switch


mppT 1010 mppT 2010



nominal power 125 W (250 W) 250 W (500 W)max. dC-dC efficiency 98.3 % (uBatt=24 V; uin=30 V; P=0.6*Pnom)

european efficiency 94.7 % (uBatt=12 V; uin=30 V)96.7 % (uBatt=24 V; uin=30 V)

european efficiency(weighted across all uBatt and uin)

95.2 %

Static mPP efficiency 99.9 % (DIN EN 50530)

dynamic mPP efficiency 97.7 % (DIN EN 50530)

weighted rew (Realistic Equally Weighted efficiency)

92.8 %

own consumption 10 ma

dC input sidemPP voltage 15 V (30 V) < Umodul

< 75 V15 V (30 V) < Umodul

<< 100 Vopen circuit voltage solar module (at minimum operating temperature)

17 V...75 V (34 V … 75 V)

17 V...100 V (34 V … 100 V)***

module current 9 a 18 a

dC output side

load current** 10 a

Reconnection voltage (LVR)* 12.5 V (25 V)

Deep discharge protection (LVD)* 11.5 V (23 V)

battery side

Charge current 10 a 20 a



equalisation charge* 14.7 V (29.4 V)









* adjustable via Steca PA RC100 Technical data at 25 °C / 77 °F** Inverters must not be connected to the load output.*** CAUTION: If an open circuit voltage of more than 100 V is supplied to the connected solar module, the controller will be destroyed. When selecting the solar module, it is important to bear in mind that the open circuit voltage should never exceed 100 V over the entire working temperature range. When using solar modules with a maximum open circuit voltage of between 75 and 100 V (over the entire temperature range), all installation steps must be carried in accordance with protection class II.

pr 0303 pr 0505


System voltage 12 V


dC input side


module current 3 a 5 a

dC output side

load current* 3 a 5 a

Reconnection voltage (LVR) 12.5 V

Deep discharge protection (LVD) 11 V … 11.5 V

battery side

end of charge voltage 13.7 V

Boost charge voltage 14.4 V

Set battery type gel







weight 160 g

Technical data at 25 °C / 77 °F*Inverters must not be connected to the load output.

10 11

areas of application:

500 Wp

Solar CHarge ControllerS Solar CHarge ControllerS


75 Wp

MAD

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GER

MAN

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44

187

96

177

6016

5

4x ø5

10 A...30 A

147

90

110 6

15

122

55

4x ø4,3

20 A

www.steca.com

Steca pRpr 1010, pr 1515, pr 2020, pr 3030the Steca Pr 10-30 series of charge controllers is the highlight in the range.

use of the latest charging technologies combined with state of charge determination enable optimal battery maintenance and mo-dule power monitoring for up to 900 wp of connected power. a large display informs the user about all operating modes with the aid of symbols. the state of charge is represented visually in the form of a tank display. data such as voltage, current and state of charge can also be displayed digitally as figures on the display. in addition, the controller has an energy meter which can be reset by the user.

Steca pR 2020 Ipip 65 versionthe functionality of the Steca Pr 2020 iP is based on the Steca Pr line of solar charge controllers.

this is equipped with a large display which shows the current state of charge (SOC) as a percentage and graphically in the form of a tank. State of charge recognition forms the core of the charge controller. the auto-adaptive state of charge algorithm results in op-timal battery maintenance and control over the module output of up to 600 wp which can be connected to it. the Steca Pr 2020 iP has been specially designed for operation in difficult environments with high salt, moisture and dust content.

product features ∙ Hybrid controller ∙ State of charge determination with Steca AtonIC (SOC) ∙ automatic detection of voltage ∙ Pwm control ∙ multistage charging technology ∙ load disconnection depending on SoC ∙ automatic load reconnection ∙ temperature compensation ∙ Common positive grounding or negative grounding on one terminal

∙ integrated data logger / energy meter ∙ night light and morning light function ∙ integrated self test ∙ monthly maintenance charge


displays ∙ graphical lCd display

~ for operating parameters, fault messages, self test

operation ∙ Simple menu-driven operation ∙ Programming by buttons ∙ manual load switch

options ∙ Prepayment interface ∙ external temperature sensor ∙ Alarm contact (page 38)

Certificates ∙ approved by the world Bank for nepal ∙ Compliant with European Standards (CE) ∙ roHS compliant ∙ made in germany ∙ developed in germany ∙ manufactured according to iSo 9001 and iSo 14001


∙ integrated data logger / energy meter ∙ night light and morning light function ∙ integrated self test ∙ monthly maintenance charge


displays ∙ graphical lCd display



options ∙ external temperature sensor ∙ Alarm contact* (page 38)

Certificates ∙ Fit for use in tropical areas (DIN IEC 68 part 2-30) ∙ Compliant with European Standards (CE) ∙ roHS compliant ∙ made in germany ∙ developed in germany ∙ manufactured according to iSo 9001 and iSo 14001

*special version, if the alarm option is needed, this needs to be mentioned on the purchase order.

prog

ram

mab

le

pr 1010 pr 1515 pr 2020 pr 3030



own consumption 12.5 ma

dC input side


module current 10 a 15 a 20 a 30 a

dC output side

load current* 10 a 15 a 20 a 30 a

Reconnection voltage (SOC / LVR) > 50 % / 12.6 V (25.2 V)

Deep discharge protection (SOC / LVD) < 30 % / 11.1 V (22.2 V)

battery side

end of charge voltage liquid 13.9 V (27.8 V); gel 14.1 V (28.2 V)

Boost charge voltage 14.4 V (28.8 V)

equalisation charge 14.7 V (29.4 V)

Set battery type liquid (adjustable via menu)







weight 350 g

Technical data at 25 °C / 77 °F*Inverters must not be connected to the load output.

pr 2020 ip




dC input side


module current 20 a

dC output side

load current* 20 a

Reconnection voltage (SOC / LVR) > 50 % / 12.6 V (25.2 V)


battery side

end of charge voltage liquid 13.9 V (27.8 V);gel 14.1 V (28.2 V)

Boost charge voltage 14.4 V (28.8 V)

equalisation charge 14.7 V (29.4 V)








weight 350 g

Technical data at 25 °C / 77 °F* Inverters must not be connected to the load output.

prog

ram

mab

le

Steca pa TSIp10External temperature sensor(page 45)

Steca pa TS10External temperature sensor(page 45)



900 Wp 600 Wp

available as of

Q4/2014

H

L

A

H

B

availableas of

Q1/2015190

4x 5

57

119.

5

177

17.3

85

www.steca.com

20 A

Steca Solarix 2020-x2Characterisation of the operating performance



dC input side


module current 20 a

dC output side

load current** 20 a

Reconnection voltage (LVR)* 12.5 V

Deep discharge protection (LVD)* 11.7 V

uSB charge socket 5 V / 2 a

battery side



equalisation charge* 15 V (30 V)


main/auxiliary battery charging ratio

90 % / 10 %




Terminal (fine / single wire) 6mm2 / 10mm2 - awg 10 / 8



weight 500 g

* adjustable via Steca PA LCD1 Technical data at 25 °C / 77 °F** Inverters must not be connected to the load output.

product features ∙ Series controller ∙ automatic detection of voltage ∙ Voltage and current regulation ∙ Pwm control ∙ multistage charging technology ∙ Current compensated load disconnection ∙ automatic load reconnection ∙ temperature compensation ∙ integrated self test ∙ monthly maintenance charge ∙ USB charge socket for smartphones and tablets (5 V / 2 A) ∙ negative grounding

interfaces ∙ Stecalink Bus

Electronic protection functions ∙ overcharge protection ∙ deep discharge protection ∙ Reverse polarity protection of module (≤ 36 V), load and battery ∙ automatic electronic fuse ∙ Short circuit protection of load and module ∙ open circuit protection without battery ∙ reverse current protection at night ∙ overtemperature and overload protection ∙ load disconnection on battery overvoltage

displays ∙ 4 leds show operating states

options ∙ Connection of Pa lCd1 remote display possible


Key:

A Solar modulesB Solar charge controller Steca Solarix 2020-x2H BatteriesL Electrical load (230 V DC)

Steca Solsum ESl Energy-saving lights5 w, 7 w, 11 w / 12 V (Page 37)

Steca lEdEnergy-saving lights5 w, 7 w, 9 w, 13 w12 / 24 V (Page 36)

Steca pa LCD1Remote display(page 38)

Steca pf 166Solar refrigerator /freezer12 / 24 V (Page 34)

Steca pA lCd1remote display(Page 38)

Steca Solarix 2020-x2

the Steca Solarix 2020-x2 is a state-of-the-art dual battery charge controller that is ideal for use in leisure and caravan applications. it is equipped with a solar module input suitable for all 72-cell solar modules in 24 V systems and for all 36-cell solar modules in 12 V systems. Both main battery and starter battery are charged simul-taneously and continuously by the solar module. 90 percent of the available power flows into the main battery while 10 percent of the power is retained to keep the starter battery fully-charged.

the charge power split can be adapted using the Steca Pa lCd1 remote display. the charge controller is equipped with a high-power load output fed by the main battery only. the charge controller has a uSB charge socket, which can be used to charge smartphones and tablets with 5 V / 2 a. Connection of the Steca Pa lCd1 remote display is optional.

Overview of devices:

14 15Solar CHarge ControllerS Solar CHarge ControllerS


600 Wp

45 A

64.6

133.

8

217.7

177

94

5 15.5

4x 5

94

5 15.5

4x 5

NEW

gENERaTION

DC

A

C

EB

www.steca.com

Steca Tarom4545, 4545-48the new design for the Steca tarom sets new standards in this power class. a graphic display informs the user about all important system data and enables configuration and adjustment of the controller to the specific requirements of the individual system.

numerous clever functions allow the user to adjust the controller to the particular features of the system in question. thanks to the significantly improved state of charge determination, the system is optimally controlled and the batteries are protected. the Steca tarom charge controller is the best choice for system sizes of up to 2,700 wp at three voltage levels (12 V, 24 V, 48 V).

the integrated data logger stores all important system data. Controller data can be read by the minute via a Steca open uart interface. as an option, an external temperature sensor can also be connected. two additional switching contacts can be freely confi-gured as a timer, a night light function, to start generators or as surplus management.

product features ∙ Hybrid controller ∙ State of charge determination (SOC) ∙ automatic detection of voltage ∙ Pwm control ∙ multistage charging technology ∙ load disconnection depending on SoC ∙ automatic load reconnection ∙ temperature compensation ∙ Common positive grounding or negative grounding on one terminal ∙ Real-time clock (date, time) ∙ innovative, comprehensive data logger with energy meter ∙ night light and daylight function ∙ four freely programmable timers with week day function ∙ integrated self test ∙ monthly maintenance charge ∙ two configurable multifunctional contacts

Electronic protection functions ∙ overcharge protection ∙ deep discharge protection ∙ reverse polarity protection of module and battery ∙ automatic electronic fuse ∙ Short circuit protection of load and module ∙ open circuit protection without battery ∙ reverse current protection at night ∙ overtemperature and overload protection ∙ load disconnection on battery overvoltage

displays ∙ multifunction graphical lCd display with backlighting



interfaces ∙ Steca open uart

options ∙ external temperature sensor ∙ Alarm contact (page 38)

Certificates ∙ Compliant with European Standards (CE) ∙ made in germany ∙ developed in germany ∙ manufactured according to iSo 9001 and iSo 14001

User-friendly graphical lCd displayall system states are displayed intuitively via icons on the graphical multifunction display enabling simple understanding of the energy flow. all parameters can be modified via the multi-language, intu-itive menu.

Twelve-year data loggingthe Steca tarom is equipped with a unique, comprehensive data log-ger which stores module and load data for twelve years. the previ-ous 18 hours can be graphically displayed. daily, monthly and annual totals are summarised automatically for an outstanding overview of system utilisation at a glance.

load outputthe 45 a load output on the Steca tarom enables a multitude of pro-gramming options: deep discharge protection, manual load switch, automatic evening, night light and daylight functions plus timer and generator functions and surplus manager. Virtually any combination of these individual functions is possible along with independent pro-gramming for the load output and the two multifunctional contacts.

• deep discharge protection: deep discharge protection automatically protects the battery against harmfully low levels of discharge. all voltage thresholds can be freely configured via a menu based either on the battery‘s current state of charge (SOC) or on the battery voltage.

• manual load switch: the Steca tarom is equipped with a ma-nual load switch. this enables the load to be safely switched on or off via a menu meaning there is no need for additional external switches.

• Automatic evening, night light and daylight function: the charge controller allows configuration of three different automatic timer functions: evening light, night light and day-light. all the important time and delay values can be set with this. with the evening light function, the load is automatical-ly switched on at sunset and the time after which the load is switched off again can be individually specified. the night light function specifies the time after which the load is switched on after sunset and switched off again before sunrise. with the daylight function, the load is switched on automatically at night and switched off again automatically at sunrise.

• four freely programmable timers with week day function: the four freely programmable timers can be set individually ba-sed on day of the week, start and finish time. with the week day function, each timer can be used for just one or several

days of the week at a time if required. four timers can be set for each multifunctional contact. together with the load output, a maximum of twelve timers are therefore available.

• generator function: using the generator function, the Steca tarom – based on the SoC or the battery voltage – can start a generator automatically when the battery is discharged and switch this off again when the battery is full. using the surplus manager, an additional load can be activated automatically when the battery is full. this is switched off again as soon as no more energy surplus is available in the solar system. this guarantees that all available energy is used.

Simple-to-access, easy-to-connect terminalsthe extra spacious connection terminal area is designed for cables with thicknesses of up to 35 mm2. the highly sophisticated con-nection terminals make attachment and fastening of cables easier. rather than thin screws or bolts, with the Steca tarom an entire platform is raised up as a connecting piece. this guarantees safe connection of the cables to the charge controller. the spaciousness of the terminals with this additional function means installation is child‘s play.

Key:

A Solar modulesB Solar charge controllerC BatteryE Electrical load

Steca pa TS-SExternal temperature sensor(page 45)

Steca pa Cab2 Tarcom Data cable(page 44)

4545 4545-48Characterisation of the operating performance

System voltage 12 V (24 V) 12 / 24 / 48 V


dC input side

Circuit voltage solar module < 60 V < 100 V

module current 45 a

dC output side

load current* 45 a

Reconnection voltage (SOC / LVR) > 50 % / 12.5 V (25 V)

> 50 % / 50 V


< 30 % / 46.8 V

battery side

end of charge voltage 14.1 V (28.2 V) 56.4 V

Boost charge voltage 14.4 V (28,8 V) 57.6 V

equalisation charge 15 V (30 V) 60 V








weight 800 g


prog

ram

mab

le



2700 Wp

294

335.

5

130

60 A

prog

ram

mab

le NiCd

LithiumLead acid

only withTaROm mppT 6000-m

www.steca.com

Tarom mppT 6000 Tarom mppT 6000-m

Comprehensive, integrated data logger for 20 years of data recording

Buzzer for alarms

three configurable multifunctional contacts for...• ... programmable deep discharge protection (LVD)• ... generator/surplus manager• ... automatic switch functions (day, evening, night)• ... four timers

unique lithium-ion battery charge strategy

innovative charge strategy for niCd batteries

State of health (SOH) determination during ongoing operation

optimised SoC algorithm

IUIa charging for increased battery capacity (optional)

WINNER OF INNOVaTION pRIZE 20141st place at the photovoltaic Solar power Symposium in bad Staffelstein

Overview of functions:

Steca Tarom mppT 6000-m awarded the otti innovation prize 2014

the innovative Steca tarom mPPt 6000-m is a response to the current wave of technological change gripping the photovoltaic sector. through the reduction of mo-dule prices and feed-in compensation, the appeal of off-grid and private consumption systems is growing markedly. the mPPt charge controller is particularly well suited to such applications. emergent lithium-ion batteries also represent new challenges for charging technology, which the Steca tarom mPPt 6000-m handles superbly.

this innovative product won over the judges due to its outstanding benefits: at 3.6 kw, the appliance is suitable for all lithium-ion batteries. in addition to complex charging algorithms, the charge controller features battery diagnosis, a long-term data logger, in-terfaces and a high level of efficiency.

professional charging strategy for all lithium-ion batteries

the Steca tarom mPPt 6000-m is the first mPPt charge controller to also offer the option of charging lithium-ion batteries professionally using PV current. the latest research results in this area were used in its development, which took place in close cooperation with renowned, international research institutes. a self-developed charge strategy can be perfectly adapted to all available lithium chemistries using a wide range of parameters.

professional charging of NiCd batteries

using the innovative Steca tarom mPPt 6000-m all alkaline batteries like niCd or nimh batteries can also be charged. a professional, confi-gurable charging characteristic curve is available for this, which can be adapted to special battery and system prerequisites. Particularly with professional use, this charge strategy opens up entirely new possibi-lities.

Revolutionary innovative algorithms for lead batteries

State of charge (SOC): the Steca tarom mPPt 6000-m is equipped with a new type of highly-flexible algorithm for precise state of charge (SOC) calculation enabling automatic adaptation to battery and user behaviour. this enables the current state of charge to be assessed at any time.

State of health (SOH):the Steca tarom mPPt 6000-m incorporates an entirely new professi-onal method of state of health (SOH) determination of the actual bat-tery capacity. following measurement, a statement can be formulated about how the battery is ageing.

this revolutionary new development provides advanced inspection options for user, operator and manufacturer – e.g. for SoH-based awarding of battery warranties.

IUIa charging: depending on the type of battery and its state, the battery capacity can be increased by up to 20 percent by means of a constant current charge phase following full charging (IUIa charging). this function is now available for the first time for stand-alone PV systems too in the Steca tarom mPPt 6000-m.

Steca pa TS-SExternal temperature sensor(page 45)

Steca Tarom mppT6000, 6000-mthe Steca tarom mPPt solar charge controller sets new standards in the area of maximum Power Point trackers. outstanding efficien-cy along with unique safety features make it a universal top-grade charge controller.

there are two inputs that can be connected in parallel or used separately. each input has its own mPP tracker. So there are two charge controllers available in one device. different module arrays can be flexibly combined in one charge controller.

with an input voltage of up to 200 V, all kinds of solar modules can be used in various connection schemes. this charge controller combines high flexibility, maximum yields, professional battery care and an appealing design on the basis of advanced technology.

product features ∙ Two independent maximum power point trackers (MPP trackers) ∙ two inputs (connected in parallel or used separately for two different module arrays)

∙ robust metal casing ∙ Comprehensive data logging of energy values for up to 20 years ∙ Data logger Micro-SD card for all minute values (6000-M only) ∙ Voltage and current regulation ∙ Pwm control ∙ temperature compensation ∙ monthly maintenance charge ∙ Three configurable multifunctional contacts (6000-M only) ∙ adjustable cut-off voltages ∙ Battery type: gel/liquid lead battery (for 6000-M also Li, NiCd and NiMh batteries)

∙ integrated, automatic module switch ∙ 36 V and 60 V batteries can be charged with special settings in expert menu level

Electronic protection functions ∙ overcharge protection ∙ reverse polarity protection of module and battery ∙ automatic electronic fuse ∙ open circuit protection without battery ∙ reverse current protection at night ∙ overtemperature and overload protection ∙ Pe connection

displays ∙ multifunction graphical lCd display with backlighting ∙ Configuration via display unit

interfaces for the Steca Tarom mppT 6000-m ∙ Stecalink Bus ∙ open Steca rS232 interface ∙ Battery emergency off signal connection (optional, only for use with lithium-ion batteries)

options ∙ external temperature sensor (included in the scope of delivery with the 6000-M)

∙ Connection for battery voltage sensor cable


mppT 6000 / mppT 6000-m

Characterisation of the operating performanceSystem voltage 12 V / 24 V / 48 V

nominal power 900 w / 1,800 w / 3,600 w

max. dC-dC efficiency 99.4 % (uBatt=48 V; uin=70 V; P=0,65*Pnom)

european efficiency 96.6 % (uBatt=24 V; uin=30 V)98.9 % (uBatt=48 V; uin=70 V)

european efficiency (weighted across all uBatt and uin)

96.4 %

Static mPP efficiency 99.9 % (DIN EN 50530)

dynamic mPP efficiency 99.8 % (DIN EN 50530)

weighted rew (Realistic Equally Weighted efficiency)

94.8 %

own consumptiom < 1 w

dC input sidemin. mPP voltage / input 17 V / 28 V / 56 V

max. mPP voltage / input 180 V

min. open circuit voltage solar module / input (at minimum operating temperature)

20 V / 40 V / 80 V

max. open circuit voltage solar module / input (at minimum operating temperature)

200 V

module current / input 30 a

battery sideCharge current 60 a

end of charge voltage 14.1 V / 28.2 V / 56.4 V

Boost charge voltage 14.4 V / 28.8 V / 57.6 V

equalisation charge 15 V / 30 V / 60 V


operating conditionsambient temperature -25 °C … +50 °C

fitting and constructionTerminal (fine wire) 35 mm2 - awg 2


dimensions (X x Y x Z) 295 x 335 x 125 mm

weight approx. 6,300 g

Technical data at 25 °C / 77 °F

6000-m only:

Steca pa Cab2 Tarcom Data cable(page 44)



3600 Wp

86,00%

88,00%

90,00%

92,00%

94,00%

96,00%

98,00%

100,00%

0 500 1000 1500 2000 2500 3000 3500U_inP/W

70 V Modul voltage 48 V Battery voltage Efficiency in %30 V Modul voltage 24 V Battery voltageEfficiency in %

DC-DC efficiency

TaROm mppT 6000-m

www.steca.com

greater efficiency. greater flexibility. greater comfort. less devices. less modules. less costs.

Save in the right places with Steca Tarom mppTwith its innovative functions, the Steca tarom mPPt not only offers greater efficiency, flexibility and comfort but also helps to avoid cer-tain unnecessary costs that are incurred during the planning, imple-mentation and ongoing operation of PV systems.

no need for additional devices!

... due to added flexibility as a result of the wide input voltage rangethe Steca tarom mPPt can be used with a wide input voltage range, which allows greater flexibility when selecting modules. the entire input voltage range of up to 200 V can be used for 12 V, 24 V and 48 V batteries.

... due to the two separate inputs two inputs each with independent mPP tracking in one charge con-troller provide greater options when it comes to system planning. with the Steca tarom mPPt you can not only vary the module types for each input but the circuits too. Series and parallel circuits can be combined easily in one system using the universal and flexible Steca tarom mPPt. there is no need for an external module circuit box as all module strings can be connected directly to the charge controller leading to significant savings on installation costs.

...due to two maximum power point trackers (mppT)the two separate maximum power point trackers enable various module types to be used with just one Steca tarom mPPt charge controller. leftover module stock can also be used in a system wi-thout any problems. Significantly greater options are also available when upgrading existing systems – without the extra cost of repla-cing an existing charge controller. the Steca tarom mPPt is particu-larly suitable for systems where partial shading of the module array is unavoidable. due to the two separate mPP trackers, the charge controller can power different strings with an individually adjusted mPP. this enables the maximum efficiency to be exploited for each string enhancing the total output of the system – in spite of partial shading. the same principle applies also for use on roofs or areas with various angles of inclination or orientations.

... due to the comprehensive, integrated data loggerthe Steca tarom mPPt is equipped with a unique, comprehensive data logger, which enables data of the two inputs to be monitored and saved independently over a period of twenty years. the previous 18 hours can be graphically displayed. daily, monthly and annual totals are summarised automatically for an outstanding overview of system utilisation at a glance.

Enjoy numerous added benefits!

User-friendly graphical lCd displayall system states are displayed intuitively via icons on the graphical multifunction display enabling simple understanding of the ener-gy flow. all parameters can be configured using the multi-lingual, intuitive menu.

Communication optionsthe Pa HS400 current sensor can be connected via the Stecalink enabling all current flows in the system to be detected. the charge controller also shows the battery‘s current state of charge (SOC). Professional control of loads and generators is possible via the multifunctional contacts.

the Steca tarom mPPt 6000-m is equipped with three multifunc-tional contacts, which can be programmed independently of one another. these versatile individual functions can be combined vir-tually as required:

function overview of multifunctional contacts:

deep discharge protectiondeep discharge protection automatically protects the battery against harmfully low levels of discharge. all voltage thresholds can be freely configured via a menu based either on the battery‘s current state of charge (SOC) or on the battery voltage.

Evening, night light and daylight functionthe charge controller allows configuration of three different automatic timer functions: evening light, night light and daylight. all the important time and delay values can be set with this. with the evening light function, the load is automatically switched on at sunset and the time after which the load is switched off again can be individually specified. the night light function specifies the time after which the load is switched on after sunset and switched off again before sunrise. with the morning light function, the load is switched on automatically at night and automatically switched off again at sunrise.

four freely programmable timers with week day functionthe four freely programmable timers can be set individually based on day of the week, start and finish time. with the week day func-tion, each timer can be used for just one or several days of the week at a time if required.

generator functionusing the generator function, the Steca tarom mPPt 6000-m – ba-sed on the SoC or the battery voltage – can start a generator auto-matically when the battery is discharged, and switch this off again when the battery is full. using the surplus manager, an additional load can be activated automatically when the battery is full. this is switched off again as soon as no more energy surplus is available in the solar system. this guarantees that all available energy is used.

no need for additional modules!

...due to the extra high efficiencythe Steca tarom mPPt is one of the few mPPt charge controllers that can reliably attain a high and – more importantly – constant ef-ficiency across all input and output voltage ranges. the high level of reliability of the mPPt solar charge controller enables you to obtain even more power from your PV system. for example, significantly less energy is lost due to unnecessary heat losses. Conversely this means that, using the same power, as much as an entire module can be saved during planning if required. Particularly with limited mounting options or a limited budget this is an indisputable benefit.

Save time and effort during installation!

...due to the easily accessible, easy-to-connect terminalsthe extra spacious connection terminal area can be accessed via two screws on the front of the device meaning installation of cables with a thickness of up to 35 mm2 is simple, fast and secure. an integra-ted module switch means the Steca tarom mPPt can be connected without any voltage connection, sparks or light arcs. only when the charge controller is switched on via the menu are the module arrays connected up. this makes installation child‘s play.


55 A...140 A

Steca pa Tarcom data logger and Steca pa Cab1 Tarcom data cable(page 40 and 44)

Steca pa HS200Current sensor(page 41)

Steca pa 15Remote control(page 43)

360

330

190

260 50

4x ø8

260

20

MENUOK

Steca Power Tarom 2140, Power Tarom 4110, Power Tarom 4140

Steca pa HS200Steca pa HS200Steca pa HS200Steca pa HS200

190

395

130

212

11

281

59

4x ø5

www.steca.com

Steca power Tarom2070, 2140, 4055, 4110, 4140Specially designed for industrial and outdoor applications, the Steca Power tarom comes with an iP 65 casing made of powder-coated steel.

this solar charge controller can be used to control system sizes of up to 8,400 Wp at three voltage levels (12 V, 24 V, 48 V). The Steca Power tarom is based on the technology of the Steca tarom controller. when connected in parallel, several controllers from this series can be operated via a standard dC bus in a simple solar home system or a hybrid system. this allows an output of over 20 kwp to be reached.


∙ integrated data logger / energy meter ∙ night light function with Steca Pa 15 ∙ integrated self test ∙ monthly maintenance charge

Electronic protection functions ∙ overcharge protection ∙ deep discharge protection ∙ reverse polarity protection of module, load and battery ∙ reverse polarity protection by internal fuse ∙ automatic electronic fuse ∙ Short circuit protection of load and module ∙ overvoltage protection at module input ∙ open circuit protection without battery ∙ reverse current protection at night ∙ overtemperature and overload protection ∙ load disconnection on battery overvoltage

displays ∙ text lCd display



interfaces ∙ rJ45 interface to Pa tarcom / Pa HS200

options ∙ External temperature sensor (included) ∙ Alarm contact (page 38) ∙ System monitoring via a Steca Pa CaB1 tarcom

Certificates ∙ approved by the world Bank for nepal ∙ Fit for use in tropical areas (DIN IEC 68 part 2-30) ∙ Compliant with European Standards (CE) ∙ made in germany ∙ developed in germany ∙ manufactured according to iSo 9001 and iSo 14001

2070 2140 4055 4110 4140


System voltage 12 V (24 V) 48 V

own consumption 14 madC input sideopen circuit voltage solar module < 50 V < 100 V

module current 70 a 140 a 55 a 110 a 140 a

dC output side

load current* 70 a 70 a 55 a 55 a 70 areconnection voltage (SOC / LVR)

> 50 % / 12.6 V (25.2 V) > 50 % / 50.4 V

deep discharge protec-tion (SOC / LVD)

< 30 % / 11.1 V (22.2 V) < 30 % / 44.4 V

battery side

end of charge voltage 13.7 V (27.4 V) 54.8 V

Boost charge voltage 14.4 V (28.8 V) 57.6 V

equalisation charge 14.7 V (29.4 V) 58.8 V





terminal (fine / single wire)

50 mm2 - awg 1

95 mm2 - awg 000

50 mm2 - awg 1

70 mm2

- awg 0095 mm2

- awg 000



360 x 330 x 190 mm

330 x 330 x 190 mm 360 x 330 x 190 mm

weight 10 kg


prog

ram

mab

le

550 W...4,400 W

Steca Solarix pI550, 550-l60, 600, 600-l60, 1100, 1100-l60, 1200, 1200-l60in developing the Solarix Pi sine wave inverter, Steca has brought about some innovations which are unprecedented in this form. these are, above all, parallel connection, the novel operating concept which uses a single rotary switch, direct communication in order to calculate the state of charge (SOC) with Steca Tarom and Steca Power tarom, and the electronic fuse. furthermore, our many years of experience have come into play for deploying these inverters spe-cifically in photovoltaic systems. this comes through, for instance, in the way that a most diverse range of appliances is provided with a low operating consumption and a stable energy supply.

product features ∙ true sine wave voltage ∙ Can be connected to Steca Power tarom using the Steca Pax4 parallel switch box (not for Steca Tarom 4545 and 4545-48)

∙ excellent overload capabilities ∙ optimal battery protection ∙ automatic load detection ∙ Parallel connectable ∙ Best reliability ∙ Protective insulation according to protection class ii ∙ Control by digital signal processor (DSP)

Electronic protection functions ∙ deep discharge protection ∙ Battery overvoltage shutdown ∙ overtemperature and overload protection ∙ Short circuit protection ∙ reverse polarity protection ∙ automatic electronic fuse

displays ∙ multi-coloured led shows operating states

operation ∙ main switch ∙ adjustable load detection


22 23Solar CHarge ControllerS


8400 Wp

Sine waVe inVerterS


www.steca.com

600-l60 1200-l60SET-24

1800-l60SET-24

2400-l60SET-24

1100-l60 2200-l60SET-24

3300-l60SET-24

4400-l60SET-24

inverter type Pi 600 Pi 600 Pi 600 Pi 600 Pi 1100 Pi 1100 Pi 1100 Pi 1100

number of inverters / Steca Pax4 1 / 0 2 / 1 3 / 1 4 / 1 1 / 0 2 / 1 3 / 1 4 / 1


System voltage 24 V

Continuous power 450 Va 900 Va 1,350 Va 1,800 Va 900 Va 1,800 Va 2,700 Va 3,600 Va

Power 30 min. 550 Va 1,100 Va 1,650 Va 2,200 Va 1,100 Va 2,200 Va 3,300 Va 4,400 Va

Power 100 sec. 700 Va 1,400 Va 2,100 Va 2,800 Va 1,400 Va 2,100 Va 2,800 Va 3,500 Va

Power 5 sec. 1,500 Va 3,000 Va 4,500 Va 5,000 Va 3,000 Va 6,000 Va 9,000 Va 12,000 Va

Power asymmetric 350 Va 700 Va 1,050 Va 1,400 Va 500 Va 1,000 Va 1,500 Va 2,000 Va

max. efficiency 93 % 94 %

own consumption standby / on 0.5 w / 6 w 0.7 w / 10 w

dC input side

Battery voltage 21 V … 32 V

Reconnection voltage (LVR) 25 V

Deep discharge protection (LVD) 1) 21 V

AC output side

output voltage 115 V aC +/-10 %

output frequency 60 Hz

Load detection (standby) adjustable: 2 w ... 50 w

Safety

Protection class II (double insulated)

electrical protection reverse polarity battery, reverse polarity aC, over voltage, over current, over temperature




Cable length battery / aC 1.5 m / 1.5 m

Cable cross-section battery / aC 16 mm2 / 1.5 mm2


Dimensions (X x Y x Z) 212 x 395 x 130 mm 2)

weight 6.6 kg 2) 9 kg 2)

550-l60 1100-l60SET-12

1600-l60SET-12

2200-l60SET-12

1200-l60 2400-l60SET-48

3600-l60SET-48

4800-l60SET-48




System voltage 12 V 48 V








dC input side

Battery voltage 10,5 V … 16 V 42 V … 64 V

Reconnection voltage (LVR) 12.5 V 50 V

Deep discharge protection (LVD) 1) 10.5 V 42 V

AC output side




Safety











1) Data communication with Steca Power Tarom in dependence of Steca Power Tarom SOC Technical data at 25 °C / 77 °F2) per inverter

inverter typeinverter typeinverter type

115 V 60 Hz24 V

number of inverters / Steca Pax4

12 / 48 V

600 1200SET-24

1800SET-24

2400 SET-24

1100 2200SET-24

3300SET-24

4400SET-24




System voltage 24 V








dC input side

Battery voltage 21 V … 32 V

Reconnection voltage (LVR) 25 V

Deep discharge protection (LVD) 1) 21 V

AC output side




Safety











550 1100SET-12

1600SET-12

2200SET-12

1200 2400SET-48

3600SET-48

4800SET-48




System voltage 12 V 48 V








dC input side

Battery voltage 10.5 V … 16 V 42 V … 64 V

Reconnection voltage (LVR) 12.5 V 50 V

Deep discharge protection (LVD) 1) 10.5 V 42 V

AC output side




Safety











1) Data communication with Steca Power Tarom in dependence of Steca Power Tarom SOC Technical data at 25 °C / 77 °F2) per inverter

inverter type

230 V 50 Hz24 V

number of inverters / Steca Pax4

12 / 48 V

24 25 Sine waVe inVerterS Sine waVe inVerterS

A

D

C

B

E

FG

A

C

B

E

G

D

Master Slaves

AC

Mas

ter

AC

Sla

ve

AC

Sla

ve

AC

Sla

ve

Data Power Tarom

Dat

a Sl

ave

Dat

a Sl

ave

Dat

a M

aste

r

Dat

a Sl

ave

www.steca.com

Steca Solarix pI: flexible and versatile

parallel connectiona stand-alone PV system is relatively difficult to size, since often the loads and their average running times are not adequately known, or because, when the system is subsequently expanded, more loads are added.

this is where the simple expandability of the Steca Solarix Pi in-verters pays off. up to four devices can be operated in parallel. the connections are made via an external box, the Steca Pax4.

from the outside, the combination of two, three or four inverters functions like one device with a correspondingly higher capacity. in-ternally, in case of open-circuit operation or low output, e.g. for the lighting, only one inverter continues to operate. this has a positive effect on the electricity consumption, since the devices which are not turned on do not consume any power. only when a higher capa-city is called for, for example when a refrigerator is turned on, are all the inverters automatically switched on, thus ensuring trouble-free operation.

in this regard, Steca Solarix Pi inverters are all the same. only via the connection to the Steca Pax4 parallel switch box is one inver-ter designated as the master. this device then has control over the system, whilst the other Steca Solarix Pi inverters operate as slaves.

rotary switchoperating the Steca Solarix Pi is made very easy by the large rotary switch on the front of the device.

if the Steca Solarix Pi is being used as a single device, three different modes of operation are possible, and these may be selected using the rotary switch. the load detection section follows on from the ‘off’ setting on the far left. in this section, the switch can be turned continuously to match the power consumption of the smallest load. in order to reduce power consumption, the inverter is then turned off, and it checks periodically whether a load has been turned on. only if this is the case does the inverter switch itself on. the ‘on’ setting on the rotary switch follows on from the load detection sec-tion. in this operating status, the inverter makes the output voltage continually available.

if several inverters are connected in parallel, the desired mode of operation is selected using the rotary switch of the device connected to the ‘master socket’. in addition to the modes of operation described above, there is also the setting ‘all on’. this means that not only the master device is continually switched on, but all other connected inverters as well.

the use of the rotary switch makes it possible to see very quickly which mode of operation the inverter is in.

Electronic fuseone innovation in sine wave inverters is the electronic fuse as it is employed by Steca in solar charge controllers. with this fuse, the Steca Solarix Pi is protected against overloads, and also against the accidental connection of the aC output to the public grid. Because the fuse is electronic, it does not need to be replaced after it has been triggered, as is the case with mechanical fuses. as soon as the problem has been remedied, the inverter automatically reverts back to its selected mode of operation.

the Steca Solarix Pi is also internally protected against an incor-rect wiring of the battery. in case of reverse polarity, the device re-mains undamaged, and there is no need to replace the fuse.

Steca Solarix pI with Steca power Tarom

Communication with Steca power Tarom solar charge controllersa further innovation that has gone into the Steca Solarix Pi is the communication with the Steca Steca Power tarom solar charge con-trollers. a data connection to the charge controller can be created via the Steca Pax4 parallel switch box.

in this case, the inverter connected directly to the battery commu-nicates the amount of energy that has been withdrawn to the solar charge controller. the controller is thus able to calculate the correct state of charge (SOC).

this means that these systems no longer need to be switched to voltage-controlled operation or an additional current shunt.

if the switch-off threshold of 30 % SoC is reached, the Steca Solarix Pi receives a signal from the solar charge controller and sub-sequently switches itself off in order to protect the battery from deep discharge. it turns itself back on again once the SoC has rea-ched the 50 % mark.

Quick and robust controlthe Steca Solarix Pi inverter was developed to supply power to a wide range of loads. even critical loads can be operated, thanks to the quick control. at the heart of the controller is a dSP which takes on the extensive calculation work. the inverter’s necessary robust-ness is supplied by a control software program which was developed in cooperation with a renowned research institute.

low own consumptionthe sine wave inverter has benefited from Steca’s 15 years of expe-rience in the field of stand-alone PV systems. this is reflected, for instance, in the low own consumption of the Steca Solarix Pi. when used in solar home systems, the inverter is connected to the battery 24 hours a day, and is designed to consume as little as possible of the solar-generated energy whilst in load-detection or open-circuit modes.

Key:

A Solar moduleB Solar charge controllerC BatteryD Steca Solarix PI sine wave inverterE Steca PAx4 parallel switch boxF Generator junction boxG Electrical load (230 V)

550 VA / 12 V550 VA / 24 V1,100 VA / 24 V1,100 VA / 48 V

1,100 VA / 12 V1,100 VA / 24 V2,200 VA / 24 V2,200 VA / 48 V

1,650 VA / 12 V1,650 VA / 24 V3,300 VA / 24 V3,300 VA / 48 V

2,200 VA / 12 V2,200 VA / 24 V4,400 VA / 24 V4,400 VA / 48 V


142

84

170

160 5

9026

4x ø6

275 W...2,400 W

124

215

410

359

24

202 6

4x ø7

1,400 W...2,200 W

www.steca.com

Steca aJ275-12, 350-24, 400-48, 700-48, 1000-12, 2100-12, 2400-24the Steca aJ inverter series stands out with its wide range of availa-ble power classes and dC input voltages.

this enables the optimal inverter to be used for any application. the cables for connecting the battery and the load are already mounted on the Steca aJ, thus making it easier to install the device. the automatic standby mode considerably reduces the inverter’s own consumption. the Steca aJ inverter’s excellent overload capaci-ty ensures that even critical loads can be operated easily.

product features ∙ true sine wave voltage ∙ excellent overload capabilities ∙ optimal battery protection ∙ automatic load detection ∙ Best reliability

Electronic protection functions ∙ deep discharge protection ∙ Battery overvoltage shutdown ∙ overtemperature and overload protection ∙ Short circuit protection ∙ reverse polarity protection by internal fuse (except Steca AJ 2100-12)

∙ acoustic alarm at deep discharge or overheating

displays ∙ multi-coloured led shows operating states


options ∙ types with 115 V / 50 Hz, 115 V / 60 Hz or 230 V / 60 Hz ∙ model with protective lacquered mainboard ∙ Terminal for connection of a remote control (On/Off) for the types Steca aJ 275-12 to Steca aJ 700-48

∙ Remote control JT8 (On/Off, LED) for connection to Steca aJ 1000-12 to Steca aJ 2400-24

Certificates ∙ Compliant with European Standards (CE) ∙ roHS compliant

Steca XpC1400-12, 2200-24, 2200-48the Steca XPC series of inverters combine a very high overload capa-city with the capability to operate highly critical loads.

other important features of these high-quality inverters are their powerful device protection and their low own consumption. the Steca XPCs combine a sine wave inverter, four-stage battery charger and transfer system in one device, therefore making them also suita-ble for hybrid systems. the built-in multifunctional contact enables you, for example, to switch on and off diversion loads for excess power or start a diesel generator to recharge batteries.

product features ∙ true sine wave voltage ∙ excellent overload capabilities ∙ optimal battery protection ∙ adjustable integrated battery charger ∙ automatic load detection ∙ Best reliability ∙ Can be used as a back-up system or uninterruptible power supply (UPS)

∙ multifunction contact ∙ ultra-fast transfer relay

Electronic protection functions ∙ deep discharge protection ∙ Battery overvoltage shutdown ∙ overtemperature and overload protection ∙ Short circuit protection ∙ reverse polarity protection by internal fuse ∙ acoustic alarm at deep discharge or overheating


~ for operation, fault messages

operation ∙ main switch ∙ adjustable load detection ∙ Programming by buttons

options ∙ type with 230 V / 60 Hz ∙ type with 115 V / 60 Hz ∙ model with protective lacquered mainboard ∙ Protection cover C-iP23 to raise the degree of protection ∙ remote control rCC-01 ∙ CfC-01 cable entry for strain relief and protection of connections ∙ temperature sensor Ct35 to correct the voltage thresholds according to the current battery temperature


275-12 350-24 400-48 700-48 1000-12 2100-12 2400-24


System voltage 12 V 24 V 48 V 48 V 12 V 12 V 24 V

Continuous power 200 Va 300 Va 300 Va 500 Va 800 Va 2,000 Va 2,000 Va

Power 30 min. 275 Va 350 Va 400 Va 700 Va 1,000 Va 2,100 Va 2,400 Va

Power 5 sec. 450 Va 650 Va 1,000 Va 1,400 Va 2,200 Va 5,000 Va 5,200 Va

max. efficiency 93 % 94 % 94 % 94 % 93 % 92 % 94 %

own consumption standby / on 0.3 w / 2.4 w 0.5 w / 3.5 w 1.1 w / 5.2 w 1.5 w / 12 w 0.7 w / 10 w 0.7 w / 16 w 1.2 w / 16 w

dC input side

Battery voltage 10.5 V … 16 V 21 V … 32 V 42 V … 64 V 42 V … 64 V 10.5 V … 16 V 10.5 V … 16 V 21 V … 32 V

AC output side

output voltage 230 V AC +0 / -10 % (true sine wave)

output frequency 50 Hz +/-0.05 % (crystal controlled)

Load detection (standby) 2 w adjustable: 1 w … 20 w




Cable length battery / aC 1.2 m / 1 m 1.5 m / 1m 1.7 m / 1 m

degree of protection iP 30 iP 20

Dimensions (X x Y x Z) 170 x 142 x 84 mm 252 x 142 x 84 mm 455 x 142 x 84 mm 406 x 273 x 117 mm

weight 2.4 kg 2.6 kg 4.5 kg 8.5 kg 19 kg 18 kg


Steca AJ 275-12, AJ 350-24, AJ 400-48

1400-12 2200-24 2200-48


System voltage 12 V 24 V 48 V

Continuous power 1,100 Va 1,600 Va 1,600 Va

Power 30 min. 1,400 Va 2,200 Va 2,200 Va

Power 5 sec. 3,300 Va 4,800 Va 4,800 Va

max. efficiency 94 % 95 % 95 %

own consumption standby / on

0.6 w / 4 w 0.9 w / 7 w 1.3 w / 7 w

input side

input voltage adjustable: 150 V aC … 230 V aC

Charging current adjustable 0 a … 45 a 0 a … 37 a 0 a … 20 a

max. current on transfer system

16 a

Switching time transfer relay < 40 ms

battery side

Battery voltage 9.5 V … 16 V 19 V … 32 V 38 V … 64 V

Battery monitoring lVd, HVd, floating and equalisation voltage adju-stable by user via optional remote control rCC-01

AC output side

output voltage 230 V AC +0 / -10 % (true sine wave)

output frequency 50 Hz +/-0.05 % (crystal controlled)

Load detection (standby) adjustable: 1 w … 25 w




Cable length battery 165 cm

degree of protection iP 20 / with optional top cover: iP 22


weight 11.7 kg 12.6 kg




6720 W

442

220 40

8

300

160

250

497

2x ø8

2x ø8

3,000 W...72,000 W

463

130323

256 35

406

30

3x ø8Steca xtender xTm

Steca xtender xTH

www.steca.com

Steca Xtender XTS, XTm and XTH

xTS 900-12, 1200-24, 1400-48 xTm 1500-12, 2000-12, 2400-24, 3500-24, 2600-48 xTH 3000-12, 5000-24, 6000-48, 8000-48

the basic functions of the combined inverters Steca Xtender are the inverter, the battery charger, the switching function and the support of external sources of alternating current. these functions can be combined and controlled fully automatically. the inverters offer out-standing user-friendliness and very good exploitation of the energy available.

all the settings of the Steca Xtender can be remote controlled. when a software with new functions is available, it can be loaded into the system, so the Steca Xtender always stays up to date. Several Steca Xtender can be connected in parallel or to form a three-phase system. that means that up to nine Steca Xtender can work together.

product features ∙ true sine wave voltage ∙ excellent overload capabilities ∙ optimal battery protection ∙ adjustable integrated battery charger ∙ multistage programmable battery charger with PfC ∙ automatic load detection ∙ Standby load detection adjustable over a wide range, starting from a low value

∙ Parallel connectable ∙ Best reliability ∙ Can be used as a back-up system or uninterruptible power supply (UPS)

∙ multifunction contact ∙ adjustable power sharing ∙ reliable and noiseless with any kind of load ∙ Support of sources of alternating current (Smart Boost) ∙ Automatic support for peak loads (Power Shaving) ∙ ultra-fast transfer relay ∙ High efficiency ∙ Control by digital signal processor (DSP)

Electronic protection functions ∙ deep discharge protection ∙ Battery overvoltage shutdown ∙ overtemperature and overload protection ∙ Short circuit protection ∙ reverse polarity protection by internal fuse (except Steca Xtender XTH 3000)

∙ acoustic alarm at deep discharge or overheating


~ for operation, fault messages


options ∙ Type with 115 V / 60 Hz (except Steca Xtender XTH 8000-48) ∙ model with protective lacquered mainboard ∙ temperature sensor BtS-01 to correct the voltage thresholds according to the current battery temperature


multifunction contactsthese potential-free contacts can be programmed for many diffe-rent applications. they can react to any event outside or inside of the inverter (grid availability, battery voltage, fault message ...). They can also be programmed on a timer or can be switched on during particular times (at night, at the weekend ...). In this way, they can serve to start up a generator, to switch off less important loads, to signal a fault, to charge batteries depending on the situation, etc.

Smart-boost functionwith the smart-boost function, the output of another source of al-ternating current, such as a power generator or a charger connec-tion, can be increased; even when special loads are being used (in-ductive, asymmetric, with high switch-on current). It is also possible to combine the Steca Xtender with almost all inverters which are already present in order to increase the available output.

Steca rCC-02remote control and display (incl. 2 m cable)Suitable for wall-mounting(see page 39).

Not illustrated:

Steca rCC-03 remote control and display (incl. 2 m cable)Suitable for rack installation.

Steca bTS-01 battery temperature sensor (incl. 5 m cable)this sensor allows the battery voltages to be adjusted to the battery temperature.

ECf-01integrated cooling unitfor devices from the Steca Xtender XtS series.

Communications cableConnection to the three-phase system or to the parallel connection CAb-rJ45-2 (2 m)this is used to connect seve-ral inverters together to a three-phase system or a system connected in parallel.

Steca x-Connect systemprewired mounting structurefor devices from the Steca Xtender XtH series.

Steca xtender xTHSteca xtender xTmSteca xtender xTS

xTS 900-12

xTS 1200-24

xTS 1400-48

xTm 1500-12

xTm 2000-

12

xTm 2400-

24

xTm 3500-

24

xTm 2600-

48

xTm 4000-

48

xTH 3000-

12

xTH 5000-

24

xTH 6000-

48

xTH 8000-

48


System voltage 12 V 24 V 48 V 12 V 12 V 24 V 24 V 48 V 48 V 12 V 24 V 48 V 48 V

Continuous power 500 Va / 650 Va 1)

650 Va / 800 Va 1)

750 Va / 900 Va 1)

1,500 Va 2,000 Va

2,000 Va

3,000 Va

2,000 Va

3,500 Va

2,500 Va

4,500 Va

5,000 Va

7,000 Va

Power 30 min. 700 Va / 900 Va 1)

1,000 Va / 1,200 Va 1)

1,200 Va / 1,400 Va 1)

1,500 Va 2,000 Va

2,400 Va

3,500 Va

2,600 Va

4,000 Va

3,000 Va

5,000 Va

6,000 Va

8,000 Va

Power 5 sec. 2.3 kVa 2.5 kVa 2.8 kVa 3.4 kVa 4.8 kVa 6 kVa 9 kVa 6.5 kVa 10.5 kVa

7.5 kVa 12 kVa 15 kVa 21 kVa

max. efficiency 93 % 93 % 93 % 93 % 93 % 94 % 94 % 96 % 96 % 93 % 94 % 96 % 96 %

own consumption standby / on 1.4 w / 7 w

1.5 w / 8 w

1.6 w / 8 w

1.4 w / 8 w

1.4 w / 10 w

1.6 w / 9 w

1.6 w / 12 w

2 w / 10 w

2.1 w / 14 w

1.4 w / 14 w

1.8 w / 18 w

2.2 w / 22 w

2.4 w / 30 w

Power Factor Correction (PFC) according en 61000-3-2

acoustic level < 40 dB / < 45 dB (without / with ventilation)

input side

input voltage < 265 V AC (adjustable: 150 V AC … 265 V AC)

Charging current adjustable 0 a … 35 a

0 a … 25 a

0 a … 12 a

0 a … 70 a

0 a … 100 a

0 a … 55 a

0 a … 90 a

0 a … 30 a

0 a … 50 a

0 a … 160 a

0 a … 140 a

0 a … 100 a

0 a … 120 a

max. current on transfer system 16 a 50 a

input frequency 45 Hz … 65 Hz

battery side

Battery voltage 9.5 V … 17 V

19 V … 34 V

38 V … 68 V

9.5 V … 17 V

9.5 V … 17 V

19 V … 34 V

19 V … 34 V

38 V … 68 V

38 V … 68 V

9.5 V … 17 V

19 V … 34 V

38 V … 68 V

38 V … 68 V

AC output side

output voltage 230 V AC +/-2 % / 190 V AC … 245 V AC (true sine wave) / 120 V AC 2)

output frequency 50 Hz, adjustable: 45 Hz … 65 Hz +/-0.05 % (crystal controlled)

total harmonic distortion < 2 %

Load detection (standby) 2 w … 25 w




Power Smart-Boost 30 min. 900 Va 1,200 Va 1,400 Va 1,500 Va 2,000 Va

2,400 Va

3,500 Va

2,600 Va

4,000 Va

3,000 Va

5,000 Va

6,000 Va

8,000 Va

input current balance adjustment 2 a … 16 a 1 a … 50 a

multifunction contact adjustable 2 independent contacts 16 A / 250 V AC (potential free change-over contacts)

degree of protection iP 54 iP 20

Dimensions (X x Y x Z) 210 x 310 x 110 mm 323 x 463 x 130 mm 300 x 497 x 250 mm

weight 8.2 kg 9 kg 9.3 kg 15 kg 18.5 kg 16.2 kg 21.2 kg 16.2 kg 22.9 kg 34 kg 40 kg 42 kg 46 kg

Cooling principle - fan from 55 °C

Parallel connection possible 3 x 1 phase and three-phase

1) Steca Xtender XTS in conjunction with ECF-01 Technical data at 25 °C / 77 °F2) Special version, please note on order.




Steca MDCI 100

163

160

108

154

64421

4x ø6

4988

138

152

4322

7

4x ø5

70 W...360 W

Steca MDCI 360

www.steca.com

Steca mDC / mDCIdC-dC-voltage convertersdC-dC voltage converters are used when the dC-output voltage of the PV system does not match the requirements of the appliance.

Since a voltage level of 12 V is required for most low-voltage appli-ances such as lamps, multimedia devices, radios or mobile phones, the various models of the voltage converters deliver a stable supply of 12 V. for instance, if a 12 V energy-saving light is operated in a 24 V or 48 V system, then a suitable dC-dC voltage converter must be inserted between the load output of the charge controller and the 12-V energy-saving light.

the Steca mdC and mdCi voltage converters are designed for use in photovoltaic systems. the models with an output voltage of 13.6 V can also be used as battery chargers for a 12 V battery in a 24 V system.

for safety reasons, the Steca mdCi series is electrically insulated to protect the user. Both the Steca mdCi and the Steca mdC series are protected against high voltage spikes at the input, thus pre-venting harmful voltage spikes at the input of the loads.

product features ∙ High efficiency ∙ automatic detection of voltage ∙ wide input voltage range ∙ Best reliability

Electronic protection functions ∙ overtemperature and overload protection ∙ reverse polarity protection ∙ Short circuit protection

Certificates ∙ Compliant with European Standards (CE)

mdC mdCi

2412-5 2412-8 2412-12 2412-20 2412-30 1224-7 100 200 360


nominal power 65 w 105 w 160 w 275 w 415 w 170 w 100 w 200 w 360 w


dC input side

input voltage 18 V … 35 V 20 V … 35 V 9 V … 18 V 9 V … 18 V / 20 V … 35 V / 30 V … 60 V / 60 V … 120 V

dC output side

output voltage 13.2 V 13.8 V 24 V 12.5 V / 24 V

output current 5.5 a 8 a 12 a 20 a 30 a 7 a 8 a / 4 a 16.5 a / 8 a 30 a / 15 a


ambient temperature -20 °C ... +40 °C -20 °C ... +45 °C


galvanic isolation no yes


87 x 85 x 49 mm 87 x 115 x 49 mm

87 x 125 x 49 mm

87 x 115 x 49 mm

88 x 152 x 49 mm

88 x 182 x 49 mm

163 x 160 x 64 mm

weight 170 g 250 g 260 g 480 g 600 g 300 g 500 g 600 g 1.4 kg

Cooling principle convection fan convection convection fan


300 W

300 300-l60


System voltage 12 V

Continuous power 300 Va

Power 30 min. 300 Va

Power 5 sec. 350 Va

Power asymmetric 250 Va

max. efficiency 85 %

own consumption standby / on 0.5 w / 9 w

dC input side

Battery voltage 10l.5 V … 15 V

Reconnection voltage (LVR) 12.5 V

Deep discharge protection (LVD) 10.5 V

AC output side

output voltage 230 V aC +/-10 % 115 V aC +/-10 %

output frequency 50 Hz 60 Hz

Safety


electrical protection no reverse polarity protection for the battery,reverse polarity aC, over voltage,over current, over temperature




aC output side connection european plug

Cable cross-section battery 4 mm2 (AWG 12)


Dimensions (X x y x Z) 245 x 117 x 62 mm

weight 1.2 kg


Steca pLI-300300, 300-l60the Steca Pli-300 is a low-cost 300 w sine wave inverter for supp-lying small aC appliances. it has a manual on/off switch allowing theinverter to be switched off to reduce own consumption. the deviceis especially suitable for use in solar home systems where manuallyswitched small aC appliances are occasionally used in addition tothe normal dC appliances. the device is supplied with dC cables andhas a european aC power socket.

product features∙ True sine wave voltage∙ Optimal battery protection∙ Protective insulation according to protection class II

Electronic protection functions∙ Deep discharge protection∙ Battery overvoltage shutdown∙ Overtemperature and overload protection∙ Short circuit protection on the AC output side

displays∙ 2 LEDs show operating states

operation∙ Main switch

Certificates∙ Compliant with european Standards (CE)

32 33 Voltage ConVerterS Sine waVe inVerterS


360 W300 W

655

mm

1045 mm

405 m

m

270 mm

255

mm

670

mm

670 mm

445 m

m

270 mm

270

mm

Internal dimensions Steca PF 240

40 W...100 W

Steca PF 166

Steca PF 240

Internal dimensions Steca PF 166

DC

A

C

EB12 / 24 V 20 A

PR 2020PR 2020PR 2020

www.steca.com

Steca pF 166 and Steca pF 240Solar refrigerator/freezerSteca Pf refrigerators are the most efficient dC energy-saving refri-gerators ever developed. they can be used as either a refrigerator or a freezer.

the Steca Pf 166 and Steca Pf 240 are fully programmable. the inside temperature and each of the other configuration values can be set by the user. they are therefore perfectly suited for all dC appli-cations including even the refrigeration of medicines in hospitals. thanks to the latest a++ energy efficiency class, together with op-timal electronic control and an rPm control of the compressor, it is possible to ensure that the energy is used extremely efficiently. this leads to significant cost reductions.

this product stands out for its user-friendliness, thanks to a large digital display with setting options, the highest standards of quality and reliability and a long service life. the refrigerator or freezer is easy to clean as it has a sealing plug on the bottom for draining water.

product features ∙ a++ energy efficiency class ∙ fast cooling due to compressor speed control ∙ the freezers can be operated via an off-grid battery system with a 70 w photovoltaic module in most climates

∙ automatic detection of voltage ∙ temperature fully programmable ∙ adjustable refrigerator or freezer function ∙ Suitable for all dC applications ∙ low maintenance and easy to clean ∙ lock with two keys ∙ also suitable for mobile use ∙ auto-dimming for reduction of own consumption

Electronic protection functions ∙ reverse polarity protection ∙ deep discharge protection ∙ Power breakdown display ∙ temperature alarm

displays ∙ multifunction led display ∙ digital temperature display

operation ∙ Programming by buttons

Certificates ∙ Compliant with European Standards (CE) ∙ roHS compliant ∙ abstinence of ozone destroying materials according EC 1005/2009 (CFC-free)

∙ developed in germany ∙ manufactured according to iSo 9001 and iSo 14001

pf 166 pf 240

Certificates

energy efficiency class a++



nominal power 40 w … 100 w

Cooling volume 166 litres 240 litres

refrigerator temperature +2 °C … +12 °C

freezer temperature -20 °C … -10 °C

dC input side

input voltage 10 V … 17 V (17 V … 31.5 V)12 V / 24 V battery

dC output side

Reconnection voltage (LVR) 11.7 V (24.2 V)

deep discharge protection (LVD)

10.4 V (22.8 V)


ambient temperature +10 °C … +43 °C


Dimensions (X x Y x Z) 917 x 872 x 709 mm 1,288 x 919 x 760 mm

insulation strength 11 cm 12 cm

weight 47 kg 62 kg

Cooling principle compressor

refrigerant 190 g r134a

Celsius / fahrenheit tempe-rature display

adjustable

display brightness adjustable

Hanging baskets 2

freezer trays 3

Cold battery 1

automatic energy-saving mode

yes


Consumption Steca pf 166 [Wh / day]

ambient temperature 20 °C 25 °C 30 °C 35 °C 40 °C

interior temperature +8 °C 44 72 109 156 216


interior temperature -10 °C 190 259 346 454 589


Consumption Steca pf 240 [Wh / day]

ambient temperature 20 °C 25 °C 30 °C 35 °C 40 °C




interior temperature -20 °C 421 561 739 964 1,246

»keePS it all freSH«

Key:

A Solar modulesB Solar charge controllerC BatteryE Electrical load

minimum case

Steca Pf 166

Solar refri-gerator

Steca Pf 166freezer

Steca Pf 240

Solar refri-gerator

Steca Pf 240 freezer

irradiation7kwh /m² / d

5 kwh /m² / d

5 kwh /m² / d

5 kwh /m² / d

5 kwh /m² / d

ambient temperature

20 °C 35 °C 35 °C 35 °C 35 °C

inside temperature

8 °C 5 °C -15 °C 5 °C -15 °C

PV power required

45 wp 175 wp 510 wp 185 wp 550 wp

battery power required

12 V, 50 ah

24 V, 120 ah

24 V,350 ah

24 V, 125 ah

24 V, 375 ah

duration of batte-ry independence

2 days 3 days 3 days 3 days 3 days

Example applications

the application areas of the Steca Pf 166 and Steca Pf 240 solar refrigerators and freezers are multifarious: solar refrigerators and freezers by Steca cater for the most demanding requirements at all times, whether for cooling drinks in solar home systems, for storing medication in hospitals supplied by stand-alone systems or for sto-rage of frozen food. the most important parameters for the plan-ning of such applications are summarized at a glance in the table opposite.

Hospital , afghanistan

Cooled drinks, Caribbean

Hospital, nigeria

34 35 Solar refrigerator / freeZer Solar refrigerator / freeZer


55 55

Steca ESL 7, ESL 11

5 W...11 W

3 W...13 W

available as of

Q4/2014

www.steca.com

Steca LEDlEd 5, lEd 7, lEd 9, lEd 13 energy-saving lightsSteca leds are modern, compact led lamps that are specially deve-loped for all 12 V and 24 V direct voltage applications. this makes them ideal for all lighting in leisure, caravan and home applications. their high efficiency and excellent light yield make them particularly suitable for solar home systems.

product features ∙ High efficiency ∙ low weight ∙ Very long lifetime ∙ Simple installation ∙ maintenance-free ∙ low own consumption ∙ Best reliability

Electronic protection functions ∙ reverse polarity protection


Steca Solsum ESL5 W, 7 W, 11 W / 12 V energy-saving lightsthe electronics of these 12 V dC energy-saving compact fluorescent lamps (CFLs) was developed by Steca and continuously improved.

Preheating, a high electronic efficiency and low thermal losses increase the service life of these Cfls to about 100,000 switch cy-cles. the Steca energy-saving lights feature a much higher efficiency (Im/W) than LEDs or incandescent bulbs.

product features ∙ Brightness of 11 w Cfl is comparable with a 60 w incandescent bulb

∙ Saves up to 80 % of energy compared to an incandescent bulb ∙ greatest switch cycle stability ∙ Best reliability ∙ easy to install by a e27 or bayonet socket ∙ Compact and robust product design

Electronic protection functions ∙ reverse polarity protection

Certificates ∙ approved by the world Bank for China and Sri lanka ∙ Compliant with European Standards (CE) ∙ developed in germany ∙ manufactured according to iSo 9001 and iSo 14001

E27-Sockel base for Steca Solsum ESL and Steca Steca LED‘s

E27-Sockel base for Steca Solsum ESL and Steca Steca LED‘s

lEd 5 lEd 7 lEd 9 lEd 13


nominal voltage 12 / 24 V

nominal power 5 w 7 w 9 w 13 w

rated current 0.4 a / 0.2 a 0.48 a / 0.24 a

0.74 a / 0.37 a

0.98 a / 0.49 a

luminus flux 470 lm 580 lm 810 lm 1,075 lm

luminus efficiency 97.5 lm / w 100 lm / w 92 lm / w 90 lm / w

light colour cold / neutral light (5,700 K)

life span > 30,000 h

dC input side

input voltage 10 V ... 30 V


ambient temperature

-10 °C ... +50 °C


dimensions (X x Y x Z)

60 x 100 mm

56 x 104 mm

58 x 107 mm

88 x 161 mm

weight 10 g 12 g 15 g 29 g

Socket e27


ESl 5 ESl 7 ESl 11


nominal voltage 12 V

nominal power 5 w 7 w 11 w

rated current 420 ma 580 ma 920 ma

luminus flux 250 lm 370 lm 650 lm

luminus efficiency 50 lm / w 52 lm / w 60 lm / w

life span > 9,000 h

Switching cycles 100,000

dC input side

input voltage 10 V … 15 V


ambient temperature -20 °C ... +50 °C



Dimensions (X x Y x Z) 55 x 123 mm 55 x 133 mm 55 x 163 mm

weight 125 g 135 g

Socket e27 / bayonet

light colour cool white (6,400K) / warm white (2,700K)


36 37energy-SaVing ligHtS


energy-SaVing ligHtS


available as of

Q1/2015

www.steca.com

Steca RCC-02Accessories for Steca xtender xTS, xTm and xTH

remote control and displaylots of information on the status of the system can be re trieved using the graphic display of the Steca rCC-02. any incidents within the system are also saved and displayed. this means that any pro-blems which might occur are identified early.

many values of the Steca Xtender can be set using the Steca rCC-02, such as the charging process of the battery charger, the programming of the multifunctional contacts and the various ope-rating modes.

an Sd-card slot can be used to save parameters, for transferring data or updating the software.


operation ∙ Programming by buttons


rCC-02




weight 400 g


product features ∙ low weight ∙ Simple installation ∙ maintenance-free ∙ low own consumption ∙ Best reliability

Steca pa RC100remote controlSteca Pa rC100 remote control allows to program Steca solar charge controllers. the values can be adjusted with the help of switches. after a restart of the charge controller the new settings can be ac-tivated by pressing the program-button on the Steca Pa rC100. an led will transfer the values to the controller.

pA rC100


Supply voltage 4.5 V (3 x 1.5 V AAA / R03 batteries)

adjustable parameters – type of battery: gel / liquid – night-light function– End of charge voltages (float / boost / equal)– Deep discharge protection (LVD)– lVd factor– Switch-on threshold

Suitable for the following Steca charge controllers

– Steca Solsum f – Steca PrS– Steca Solarix mPPt 1010/2010



weight 90 g


pA lCd 1


System voltage 10 V ... 60 V


adjustable parameters – End of charge voltages (float / boost / equal)– distribution of the charge power between main and auxiliary battery– type of battery– lVd / lVr load output

Safety

alarm output for all recorded parameters programmable


ambient temperature -10 °C ...+ 60 ° C

relative humidity 0 % … 95 %, non-condensating


interfaces 1x rJ45, Stecalink Bus

uSB charger socket 5 V / 500ma


mounting surface-mounted / flush-mounted




Steca pa LCD1remote display for Steca Solarix 2020-x2the Steca Pa lCd1 is a remote graphical display for the Steca Solarix 2020-x2 solar charge controller. all system information is shown at a glance, with the energy flow displayed as a graphic, rendering it intuitively comprehensible. the remote display is equipped with a comprehensive data logger with a graphical display, which enables full monitoring of the entire system. Virtually all charge controller parameters can be set and modified using the remote display. this enables the distribution of charge power between the two batteries to be adjusted. for the load output, all automatic time and battery voltage functions are fully programmable. a uSB charge socket for smartphones and tablets is also available.

product features ∙ Can only be used in conjunction with the Steca Solarix 2020-x2 ∙ Simple installation ∙ maintenance-free ∙ fully-fledged integrated data logger ∙ Best reliability ∙ four freely programmable timers with week day function ∙ evening, night light and daylight functions ∙ generator manager ∙ Surplus manager ∙ automatic shutdown when not in use for more than week


~ for operating parameters, voltage, current, fault messages

operation ∙ Simple menu-driven operation ∙ Programmable via 4 buttons

interfaces ∙ Stecalink Bus


Optional alarm contactSteca solar charge controllers provide alarm contacts which allow to process this information in any other application. in case of an alarm such as low battery voltage, over temperature, overvoltage or other alarms a signal is processed which can be used for any pur-pose. the alarm codes are different among the Steca solar charge controllers. each controller has its own alarm code table. in case an alarm is active either a 5 V signal to ground is active on the alarm contact or a galvanic isolated switch is closed. as soon as the alarm is no longer active the signal goes back to 0 V. the following table provides an overview on the available alarm options for Steca solar charge controllers.

Steca solar charge controller Signal dry contact Additional electronics necessary

Steca Pr 10-30 0 V / 5 V no yes, for: - signal processing - galvanic isolation

Steca Pr 2020 iP alarm switch contact max. 50 V dC / 100 ma yes no

Steca tarom 4545Steca tarom 4545-48 switch contact max. 30 V dC / 1 a yes no

Steca Power tarom switch contact max. 50 V dC / 100 ma yes no

Steca tarom mPPt 6000-m 3x switch contact max. 30 V dC / 1 a yes no

38 39


aCCeSSorieS aCCeSSorieS


∙

82

129

38

120 4

5016

4x ø3,5

TarCom software included

pa HS400available as of

Q1/2015

6024

103

95

12

4

2x ø4

8028

148

140

14

4

2x ø4

www.steca.com

product features ∙ 4 years maximum storage capacity (1 Mbit) ∙ adjustable logging intervals ∙ Stores 8 data sets at programmed intervals ∙ freely programmable alarm states

displays ∙ led shows operating states

interfaces ∙ rJ45 communication interface to Steca Power tarom ∙ rS232 serial interface to PC ∙ analogue sensor input e.g. for radiation or wind speed ∙ alarm contact

Tarcom software ∙ data transfer by modem or by text message ∙ downloads data from the logger to a PC ∙ list of data sets can be exported to mS-eXCel ∙ Graphic visualisation of data sets (values/time) ∙ Analyzes energy flows (Ah) within a PV hybrid system ∙ activation and selection of alarm types ∙ Setting the interval for calls and for sending text messages ∙ Configures the telephone number and text message recipient ∙ tells the data logger at what time it has to call ∙ alarms can be set by text message

Certificates ∙ Compliant with European Standards (CE) ∙ made in germany ∙ developed in germany

Steca pa TarcomAccessories for Steca power Tarom

data loggerthe Steca Pa tarcom data logger is connected to the rJ45 inter-face of the Steca Power tarom charge controller, or via the Steca Pa HS200.

the data logger is available in several different versions: as a simple rS232 interface to directly save and read data on the PC or Laptop (Steca PA Tarcom 01), as a data logger with an integrated analogue modem (Steca PA Tarcom RMT), as a data logger with an integrated gSm modem for remote monitoring (Steca Pa tarcom GSM) and as a data logger with an Ethernet interface for connection to a PC network (Steca PA Tarcom Ethernet). The Steca PA Tarcom is delivered with its accompanying software.

product features ∙ robust metal casing ∙ automatic detection of voltage ∙ wide current measuring range ∙ Potential free current measurement ∙ Communicates and transfers current flows to the charge controller

∙ integrated Hall sensor

Pa HS400 only: ∙ Convenient configuration via charge controller ∙ Connection of up to 8 sensors possible ∙ enhanced measuring precision due to multiple winding ∙ Zero calibration possible via charge controller ∙ automatic detection of current direction

displays ∙ 1 or 3 LEDs indicate operating states (Steca PA HS200/400) ∙ display via charge controller screen

interfaces ∙ two rJ45 cable sockets

modes of operation ∙ »Battery«: measures all battery current flows ∙ »load«: measures currents of external loads not connected to the charge controller

∙ »Charge«: measures currents of generators

Certificates ∙ Compliant with European Standards (CE) ∙ made in germany ∙ developed in germany

Steca pa HS200/400Accessories for Steca Tarom mppT 6000-m and Steca power Tarom

Current sensorthe Steca Pa HS200/400 is a highly intelligent current sensor with extremely low own consumption.

The Steca PA HS200/400 comes into play when (e.g.) an inverter is directly connected to the battery and the charge controller cannot measure the current consumption. a shunt is also required when an additional generator (e.g. PV, wind or diesel) directly charges the battery. the current is measured contact-free via a Hall-effect sen-sor. the data is transmitted to the charge controller over a cable con-nection. all types of current flows can be detected: charge current, load current and battery and dC-side inverter current flows.

modem

Steca pA Tarcom

Smartphone

Example of application Steca pA Tarcom gSm

Server

01 rmT gSm Ethernet


System voltage 12 V / 24 V / 48 V

logger capacity 1 Mbit = 2 min. (11 days) 4 h (4 years)

own consumption < 10 ma 30 ma

recorded values relative time, total charge current, battery current, solar module current, load

current, SoC, battery voltage, system status, analog sensor

System status information night, overload, load disconnect, overvoltage, low voltage, over temperature, no module

dC output side

Battery voltage 8 V ... 65 V

Safety

alarm output for all recorded parameters programmable


interfaces rS232 analog modem

gsm modem

ethernet

Configurable analog auxiliary input

0 mV ... 150 mV


weight 150 g


pA HS200 pA HS400


System voltage 10 V … 65 V 12 V … 65 V

own consumption < 9 ma ≤ 9 mA

measurement accuracy (-20 A … +20 A) +/-1 %(-200 A … +200 A)

+/-3 %

(-40 A … +40 A) +/-1 %(-400 A … +400 A)

+/-3 %

measuring interval 60 s 1 s


ambient temperature -15 °C … +50 °C -25 °C … +50 °C

relative humidity 75 %


interfaces Power tarom Stecalink Bus(Tarom MPPT 6000-M)

Current range “battery“ mode

-200 a... +200 a -400 a... +400 a

Current range “charge“ mode

0 a … +200 a 0 a … +400 a

Current range “load“ mode

-200 a … 0 a -400 a … 0 a


Dimensions (X x Y x Z) 103 x 60 x 24 mm 140 x 80 x 28 mm

weight 120 g 250 g

max. diameter for battery cable

19 mm 20 mm


Solar charge controller Type

Steca Power tarom Steca Pa HS200

Steca tarom mPPt 6000-m Steca Pa HS400

0 A...400 A

Steca PA HS200

Steca PA HS400

40 41aCCeSSorieS


aCCeSSorieS


24 kW

0 A...5 A

0 A...200 A

www.steca.com

Steca pa IRS 1008/180motion detectorthe Steca Pa irS 1008/180 motion detector is connected to the load output of the night light charge controller. this supplies power to the light, which is then turned on for a few minutes when some movement is detected.

the Steca Pa irS 1008/180 stands out, above all, with its extre-mely low own consumption, and is therefore optimal for use in solar power systems.

Steca pax4Accessories for Steca Solarix pi

parallel switch boxup to four Steca Solarix Pi can be operated in parallel. the connec-tions are made via an external box, the Steca Pax4.

a further innovation that has gone into the Steca Solarix Pi is the communication with the solar charge controllers from the Steca Power tarom series. a data connection to the charge controller can be created via the Steca Pax4.

pAx4



relative humidity 0 % … 95 %


Cable data cable master: 0.5 m reddata cable slave 1: 0.5 m grey

data cable slave 2: 1m greydata cable slave 3: 1m grey

data cable Steca Power tarom: 3 m black

interfaces 6 x rJ45(4 x inverter, 2 x Steca Power Tarom)



weight 800 g


pA irS 1008/180 pA irS 1008/180-24


own consumption 6 ma 2 ma

turn on time 1 min. ... 5 min.

dC output side

Battery voltage 12 V 24 V

load current* 5 a


reach / detection area 7 m / 180°



pA 15


Power supply 10.5 V … 60 V dC, 5 ma

data transmission 300 Baud

transmission frequency 125 kHz signal frequency,450 kHz intermediate frequency

dC output side

load current* 15 a; 10 a at 40 °C; 100 a pulse < 10 µs

Safety

overload protection by 15 a fuse

wrong polarity protection fuse




Terminal (fine / single wire) 2.5 mm2 / 4 mm2 - awg 14 / 12



weight 110 g


type A type b


System voltage 12 V (24 V) 36 V (48 V)

Coil voltage 9 V ... 36 V 32 V ... 95 V

rated current 200 a 200 a

life span 1 million switching cycles

Contact resistance 0.1 mΩ … 0.3 mΩ





weight 430 g


product features ∙ Receives information on SOC and time (day/night) ∙ load control via priority assignment ∙ adjustable SoC thresholds ∙ Connects a maximum of 9 solar arrays in parallel ∙ Current surge switch function

Electronic protection functions ∙ Switches off load if there is no signal ∙ reverse polarity protection by internal fuse ∙ overtemperature and overload protection

operation ∙ Configuration by jumpers

modes of operation ∙ management of parallel solar generators ∙ when the battery is full, excess energy is redirected to additional loads such as pumps, water heaters

∙ automatic start / stop of diesel or wind back-up generators ∙ night light function ∙ acoustic alarm at deep discharge or overheating


Steca pa 15Accessories for Steca power Tarom

remote controlthe Steca Power tarom charge controllers send out sig-nals (125 kHz on 300 Baud) which are modulated on the DC cable and received by the Steca Pa 15 remote control.

these signals contain information on the batteries‘ state of charge (SOC). The Steca PA 15 features five different operating modes (see below) which can be set using five different jumper positions. The maximum switching capacity of 15 a can be increased with a Steca Pa eV200 dC relay to up to 200 a if desired.

Steca pa EV200 DC12 V / 24 V, 36 V / 48 V dC relaythe Steca Pa eV200 relay increases the switching capacity of the Steca PA 15 remote control from 15 A to 200 A (up to 10 kW). The relay is connected to the Steca Pa 15 remote control at the load output and, for example, interrupts the battery voltage to a back-up generator when the end-of-charge voltage is reached. the relay is hermetically sealed and operates safely in difficult environmental conditions such as dust, salt and moisture.

product features ∙ low own consumption ∙ ready for connection to the Steca Pa 15 remote control

42 43 aCCeSSorieSaCCeSSorieS




900 W

12 kW

www.steca.com

Steca pa TS10, Steca pa TSIp10and Steca pa TS-SExternal temperature sensors

the Steca Pa tS10, Steca Pa tSiP10 and Steca Pa tS-S external tem-perature sensors are used for monitoring the battery temperature.

all Steca solar charge controllers have an integrated temperature sensor that makes them capable of adjusting the charging strategy to suit the current temperature conditions. the external temperature sensors are only required when the battery must be installed in a different room to the solar charge controller.

the Steca Pa tS10 and Steca Pa tSiP10 are supplied with a plug for connection to the solar charge controller and ring eyelets for connection to the battery screw.

the external temperature sensors are suitable for use with Steca Pr 10-30, Steca Solarix mPPt, Steca Pr 2020 iP, Steca tarom 4545 and Steca tarom mPPt 6000 solar charge controllers.

pA TS10 pA TSip10 pA TS-S


measurement accuracy +/-5 %


ambient temperature -25 °C ... +125 °C


Battery connection ring eyelet Ø 10 mm Pin

Charge controller connection

plug twice a 2-pole luster terminal

2-pole cable, optio-nal connector

Cable 3.75 m without cable 1.8 m


weight 95 g 30 g 40 g


Solar charge controller Type Connection

Steca Pr 10-30Steca Solarix mPPt 1010/2010 Steca Pa tS10 spring connector strip

Steca Pr 2020 iP Steca Pa tSiP10 twice a 2-pole luster terminal

Steca tarom 4545Steca tarom 4545-48 Steca Pa tS-S connector block

Steca tarom mPPt 6000 Steca Pa tS-S 2-pole connector

product features ∙ Passive sensor ∙ low weight ∙ Very long lifetime ∙ Simple installation ∙ maintenance-free ∙ no own consumption ∙ Best reliability


Steca PA TS-S

Steca top-hat rail mounting kitthe Steca top-hat rail mounting kit allows easy mounting of Steca solar charge controllers on a top-hat rail. the set consists of two retaining brackets and two screws.

the retaining brackets are screwed to the solar charge controller using one screw per bracket. this then allows the solar charge con-troller to be positioned on the top-hat rail and clicked into place.

the brackets can be easily retrofitted to Steca solar charge con-trollers.

product features ∙ Simple installation ∙ Best reliability

Steca pa Cab1 Tarcom andSteca Tp Cab2 Tarcom

data cableSteca data cables are used to connect the Steca tarom and Steca Power tarom solar charge controllers to a PC via a uSB port. this allows direct monitoring of a system without using a data logger. this feature is especially suitable for short-term system monitoring and on-site testing. the most important system information is trans-ferred to the PC in real time and can be conveniently analysed and graphically visualised using the Steca tarCom software.

to use this convenient data transfer system a driver and the Steca tarCom software must first be installed on the PC (download availa-ble at www.stecasolar.com).

„tarom rJ45 in“ can be selected under options/settings/extra in the Steca tarCom software menu system. the software then directly accesses the data from the Steca Power tarom solar charge control-ler and displays this on the PC.

product features ∙ Connection cable 1.8 m ∙ ftdi chip as uSB-rS232 converter

interfaces ∙ Steca tarom connected via connector block ∙ Connection to Steca Power tarom via rJ45 plug ∙ Connection to PC via uSB

installation software (Windows xp) ∙ Steca tarCom PC-Software ∙ Virtual COM port (by FTDI driver) ∙ Driver for FTDI chip (by FTDI driver) ∙ Configuration of the Steca Power tarom for data transfer


Dimensions (X x Y x Z) 7.2 mm

weight 2.4 g

Software Steca TarCom

Solar charge controller Type

Steca tarom 4545, Steca tarom 4545-48 Steca Pa CaB2 tarcom

Steca Power tarom Steca Pa CaB1 tarcom

44 45aCCeSSorieS aCCeSSorieS



www.steca.com

SyStem oVerView

Solar home systems

night light systems

inverter systems

Hybrid systems

Additional systems

Steca Solsafe

Steca‘s charging technology

The right choice Solar charge controllers

mppT charge controllers inverters

today, modern and professional electricity supplies are necessary in every part of the world. for these supplies, the focus is on high industrial demands, flexibility, environmental sustainability and reliability. Steca system technology for hybrid and telecommunication systems unites these aspects, thereby crea-ting a basis for the forthcoming multimedia and communication age.

»Power from tHe Sun for rural eleCtrifiCation - all oVer tHe world.«

4746 SyStem oVerView

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a solar home system consists of a Steca solar charge controller, one or more solar mo-dules, a battery and the connected loads.

the Steca solar charge controllers control the energy flow of the entire system. they make sure that the solar module charges the battery quickly and effectively, but they also protect the battery against overcharging. if the loads discharge the battery, the solar charge controller, thanks to its precision in calculating the state of charge, switches off the load at exactly the right moment, thus protecting the battery from the dangers of deep discharge.

furthermore, Steca solar charge control-lers are equipped with an intelligent battery monitoring system. the most effective char-ging method is selected according to the re-quirements of the batteries. the solar charge controller is the central controlling compo-nent in solar home systems, for it affects all the functions of the system. for this reason, it is important to choose a reliable and high-performance solar charge controller.

SOLaR HOmE SySTEmSwith Steca solar charge controllers

Key:

A Solar modulesB Solar charge controllerC BatteryD Generator junction boxE Electrical load

the solar charge controller is connected directly to the battery using a cable as short as possible, and fixed to the wall near to the battery, so that it can be effectively cooled by the passing air flow.

in principle, the battery is always connected to the solar charge controller first. then the solar module array is connected to the solar module input of the solar charge controller. only direct current loads are used in solar home systems. they are connected directly to the load output of the solar charge controller. this means the Steca solar charge controllers always show the battery‘s exact state of charge, and thus ensure optimal battery maintenance in all situations. Various Steca energy-saving lights, Steca solar cooling units, dC-to-dC converters and other loads can be used.

Steca pf 240Solar refrigerator/freezer12 / 24 V (page 34)

Steca pf 166Solar refrigerator/freezer12 / 24 V (page 34)

Steca Solarix prSSolar charge controller10 - 30 a, 12 / 24 V(page 9)

Steca Solsum ESl Energy-saving light 5 w, 7 w, 11 w / 12 V (page 37)

Steca prSolar charge controller 3 - 5 a, 12 V(page 11)

Steca Solarix mppTmaximum power point Tracker10 - 20 a, 12 / 24 V(page 10)

Steca Solsum fSolar charge controller 6 - 10 a, 12 / 24 V(page 8)

Steca prSolar charge controller10 - 30 a, 12 / 24 V(page 12)

Steca Solarix 2020-x2Solar charge controller20 a, 12 / 24 V(page 14)

Steca lEdEnergy-saving light 5 w, 7 w, 9 w, 13 w12 / 24 V (page 36)

Sri Lanka

Australia

48 49 Solar Home SyStemS Solar Home SyStemS

Greece

DC

www.steca.com


Spain

these fit with the design of the solar home systems, but are equipped with a special Steca solar charge controller which auto-matically turns on the connected lights for a set time after sunset, and turns them off again the next morning at the latest. these systems are perfectly suited for street lamps and auto matic night-time lighting.

another special model makes these sys-tems to the ideal solution for bus stops and similar applications. operating in conjunc-tion with a motion detector, the lamp is only turned on at night time when movement is detected in a specified area. after a few mi-nutes, the light is then automatically turned off again. this function can be implemented with any Steca night light charge controller by connecting it to an external motion detector.

NIgHT LIgHT SySTEmSan important special application of solar home systems

duration of night light function “light on“:

All night After sunset before sunrise

Turn-on time delay

maximum light current Cataloguepage

Solar charge controller:

Steca Solsum f * 0 - 12 h* – – 10 a 8

Steca Pr 0 - 12 h 0 - 12 h – 30 a 12

Steca Pr 2020 iP 0 - 12 h 0 - 12 h – 30 a 13

Steca Solarix PrS * 0 - 12 h* – – 30 a 9

Steca Solarix mPPt * 0 - 12 h* – – 20 a 10

Steca Solarix 2020-x2 (only with Pa LCD1)

0 - 12 h 0 - 12 h 0 - 12 h 20 a 14

Steca tarom 4545, Steca tarom 4545-48

0 - 12 h 0 - 12 h 0 - 12 h 45 a 16

Steca tarom mPPt 6000-m 0 - 12 h 0 - 12 h 0 - 12 h100 ma (only via multi-

functional contact)18

Steca Power taromSteca Pa 15 /Steca Pa 15 with Pa eV200 dC relay

0 - 12 h – 0 - 3 h 15 a200 a

224343

* only for projects with larger order quantities. The type of night light function selected must be specified in the order.

Steca Solsum ESl Energy-saving lights 5 w, 7 w, 11 w / 12 V (page 37)

Steca Solsum f Solar charge controller 6 - 10 a, 12 / 24 V(page 8)

Steca Solarix prSSolar charge controller 10 - 30 a, 12 / 24 V(page 9)


Steca pr 2020 ipSolar charge controller 20 a, 12 / 24 V(page 13)

Steca pA irS 1008/180 motion detector(page 42)

Steca prSolar charge controller 10 - 30 a, 12 / 24 V(page 12)

Steca power TaromSolar charge controller 55 - 140 a, 12 / 24 / 48 V(page 22)

Steca pA 15 remote control720 w(page 43)

Steca pA EV200 dC dC relay12 / 24 / 48 V(page 43)

Steca TaromSolar charge controller 45 a, 12 / 24 / 48 V(page 16)

Steca Tarom mppT 6000-mmaximum power point Tracker60 a, 12 / 24 / 48 V(page 18)

Steca lEdEnergy-saving lights5 w, 7 w, 9 w, 13 w12 / 24 V (page 36)

5150 nigHt ligHt SyStemS nigHt ligHt SyStemS

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inverter systems are designed as solar home systems. the central solar charge controller ensures the battery is charged correctly and protects it against overcharging. in addition, a stand-alone inverter is connected directly to the battery in these systems so that aC appliances can be operated.

if dC appliances are also used, they can be connected directly to the charge controller.

an aC system can be created with a sys-tem voltage or battery voltage of 12 V, and also with 24 V or 48 V for greater capacities.

the simple system concept makes installa-tion quick and easy.

INVERTER SySTEmSfor both AC and dC


Key:

A Solar modulesB Solar charge controllerC BatteryD Sine wave inverterE Generator junction boxF Electrical load (12 V ... 48 V DC, 115 V ... 230 V AC)

Steca Solarix prSSolar charge controller10 - 30 a, 12 / 24 V(page 9)

Steca AJ Sine wave inverter500 - 2,400 w, 12 / 24 / 48 V(page 28)

Steca pr Solar charge controller10 - 30 a, 12 / 24 V(page 12)


DC aC

Steca pli-300Sine wave inverter300 w, 12 V(page 32)

Steca Solarix piSine wave inverters550 - 4,400 w, 12 / 24 V(page 23)

Greece

Madagascar

Steca TaromSolar charge controller45 a, 12 / 24 / 48 V(page 16)

Steca Tarom mppT 6000Steca Tarom mppT 6000-mmaximum power point Tracker60 a, 12 / 24 / 48 V(page 18)

5352 inVerter SyStemS inVerter SyStemS

www.steca.com

The main feature of a hybrid system is the use of two or more different elec-tricity sources.

alongside solar energy, photovoltaic hybrid systems generally employ a diesel genera-tor, a wind turbine or the public grid as a further electricity source. the inverters used in hybrid systems, which have integrated battery chargers, supply the connected aC loads according to demand from the battery bank of solar energy or the second electricity source. these devices also allow the batte-ries to be recharged from the extra energy source.

Photovoltaic hybrid systems offer the ad-vantage that the solar generator does not have to be significantly oversized for peri-ods of low sunlight. this avoids substanti-al costs. when selecting its energy source, the system always gives priority to the en-ergy provided by the module. in combina-tion with a controllable second source, the energy supply remains reliable and available 24 hours a day, all year round.

important features for single-phase and three-phase hybrid systems

∙ Combination of different power sources such as PV, wind, diesel generators ∙ 400 V aC three-phase and 230 V aC single-phase available 24 hours a day ∙ 12 V / 24 V or 48 V overall dC bus ∙ automatic energy management based on the state of charge calculation of the battery, including automatic start of controllable power sources like e.g. diesel generators

∙ optimised battery charging algorithm ∙ Data logger function with automatic alarm and remote monitoring (GSM) ∙ optimised system efficiency through dC and aC bus

HybRID SySTEmS


Steca xtender xTmHybrid inverter1,500 w - 36,000 w(page 30)

Steca xtender xTSHybrid inverter1,000 w - 12,600 w(page 30)

DC

aC

Steca xtender xTHHybrid inverter3,000 w - 72,000 w(page 30)

Steca power Tarom Solar charge controller55 - 140 a, 12 / 24 / 48 V(page 22)

Steca pA 15 remote control720 w(page 43)

Steca pA HS200Current sensor10 - 65 V(page 41)

Steca pA Tarcomdata logger12 / 24 / 48 V(page 40)

Steca rCC-02remote control and display(page 39)

Morocco

United Kingdom

South Africa

Steca TaromSolar charge controller45 a, 12 / 24 / 48 V(page 16)

Steca Tarom mppT 6000Steca Tarom mppT 6000-mSolar charge controller60 a, 12 / 24 / 48 V(page 18)

5554 HyBrid SyStemS HyBrid SyStemS

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the central, intelligent element within the system is the Steca tarom or Power Tarom solar charge controller (B): it controls the energy flow and protects the battery against critical states. Steca tarom /Power tarom is directly connected to the battery, just as the dC bus is. Using a shunt, the Steca PA HS200 (E), which is situated on the minus cable attached to the battery, the battery current is measured and this information is passed on to the Steca tarom / Power ta-rom (B). Further components, such as an inverter or the Steca PA 15 remote control, are directly connected to the dC bus. in order to automatically start a diesel generator (G) if the battery’s state of charge (SOC) falls below an adjustable threshold, the output of the Steca Pa 15 is connected to a relay. the normally open contact of the relay switches the diesel generator on, and subsequently switches it off again.

the Steca tarom / Power tarom controls the dC hybrid system. The Steca PA HS200 current sensor (E) transfers all infor mation on the charge and discharge currents at the dC bus to the Steca tarom / Power tarom. with the aid of this data, the controller is able to calculate the current state of charge of the battery. this information is transferred via the DC cabling (powerline modulation) to all con-nected Steca Pa 15. every Steca Pa 15 can be independently confi-gured to a certain switch-on and switch-off threshold of the state of charge.

the control concept is similar to that of the single-phase system. if more than one Steca tarom / Power tarom is employed, one of the devices must be desig nated as the master tarom. all other char-ge controllers are then automatically designated as slave taroms. the master tarom / Power tarom is directly connected to the bat-tery and all slaves are connec ted to the dC bus. only the master tarom / Power tarom shows the correct state of charge on its display and controls the energy flow around the system. Slave taroms / Po-wer taroms perform the function of controlling the charging from the connected PV modules.

in order to assemble a three-phase energy supply, three inverters are connected to the dC bus. Various three-phase generators can be connected to the three inverters for controlled recharging of the battery via a Steca Pa 15 and a relay. these may be wind, water, or diesel generators or the public grid. Suitable inverters with inte-grated battery chargers in three-phase mode are the Steca Xtender devices (XTS, XTM, XTH). In total, a maximum of 72 kW can be supplied.

if, in the above example, the inverter is discharging the battery, then this information is transferred to the Steca tarom / Power tarom, which calculates the state of charge. as soon as the state of charge falls below the appointed threshold value of the connected Steca PA 15 (e.g. 30 %), the controller switches on the diesel generator via a relay. The load is now being supplied from the generator (G), and at the same time the battery is being recharged. after the state of charge has reached the Steca Pa 15’s appointed upper value (e.g. 90 %), the diesel generator is switched off again.

in order to create an automatic energy management system, the aC output of the diesel generator is connected to the aC input of the inverter (with integrated battery charger). The load is always connected to the output of the inverter. if the diesel generator is running, and this current flows to the inverter, then the inverter au-tomatically switches to transfer mode. the loads are supplied from the diesel generator whilst the battery recharges via the inverter. if the aC output voltage of the diesel generator falls under a certain voltage level, which can be adjusted on the inverter, then battery operation is automatically switched back on.

this system allows for automatic energy management which gets optimum use from the available solar energy, maintains the batteries reliably, and ensures electricity supply around the clock.

Both single-phase and three-phase hybrid system concepts are ba-sed on the same principles of energy management. with the help of the Steca Pa HS200 current sensor, the charge and discharge currents of the components, such as slave taroms / Power taroms, inverters etc., are determined and communicated to the master ta-rom / Power tarom. Based on the calcu lated state of charge of the battery, the Steca Pa 15 switches the extra generator on or off. the three single-phase inverters switch off if the voltage falls below a given threshold in order to protect the battery from deep discharge.

SINgLE-pHaSE DC HybRID SySTEmS

THREE-pHaSE DC HybRID SySTEmS

Australia

Key:

A Solar modules B Solar charge controller Steca Power Tarom C 3 Hybrid inverters Steca Xtender (XTS, XTM, XTH) D Data logger Steca PA Tarcom E Current sensor (shunt) Steca PA HS200 F Wind turbines with inverterG Diesel generatorH BatteryK Public gridL Electrical load (400 V AC)

Key:

A Solar modules B Solar charge controller Steca Power Tarom C Hybrid inverter Steca Xtender (XTS, XTM, XTH) D Data logger Steca PA Tarcom E Current sensor (shunt) Steca PA HS200 F Wind turbines with inverterG Diesel generatorH BatteryK Public gridL Electrical load (230 V AC)

56 57HyBrid SyStemS HyBrid SyStemS

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www.steca.com

with very large load requirements, aC-coupled hybrid systems can provide a sensible alternative to the very effective and cheap to im-plement dC hybrid systems. this topology is beneficial if the largest part of the loading is required on the AC side (L) during the day. Steca aC hybrid systems can be implemented using the Steca grid and sine wave inverters (B and C).

Various generators (A and F) are coupled to the AC bus. In addi-tion, bi-directional sine wave inverters (C) are deployed, which are used for charging the batteries and can also be used for supplying the load if the AC generators (A and F) supply insufficient power. in addition, it is also possible to couple solar generators via a Steca solar charge controller (D) directly to the batteries (H) on the DC side.

if not enough energy should be available in the system in order to supply the load, a diesel generator (G) can be started automatically. when the diesel generator is running, it must be ensured that all grid inverters (B) have been disconnected from the grid. This is necessary in order to prevent the inverters (B) from feeding back into the diesel generator and destroying it when the battery is full. as soon as the diesel generator has been switched off, the grid inverters (B) can again be automatically connected to the grid. the loads are then again supplied by the PV generators (A) via the grid inverters (B).

The Steca Xtender battery inverters (C) here create the grid into which the grid inverters (B) feed, and from which the loads (L) are supplied. If the PV generators (A) produce a higher output than the loads (L) take up, the battery inverters (C) charge the batteries (H) with the excess power difference.

Steca droop modeWhen the batteries (H) have reached the cut-off voltage, they can no longer fully take up this power difference. there is then more output available in the system than can be used. The battery inverters (C) then activate the Steca droop mode.

the coolcept grid inverters with the droop mode are specially designed to meet the demands of aC-coupled hybrid systems and interact perfectly with the Steca Xtender battery inverters (C). These increase the frequency of the aC grid in a linear fashion, depen-ding on the excess output of the grid inverters. the more excess output available, the higher the grid frequency. the grid inverters then restrict the feed output to precisely the feed output which fully supplies the loads (L) and maintains the batteries (H) at the cut-off voltage. in this way, they create a balanced output level in the hybrid system. if the level of the load changes, the grid inverters immedi-ately adjust their feed output and continuously offset the output balance so that the batteries (H) can be fully loaded in an optimum

manner. as soon as the excess output from the grid inverters decreases, the battery inver-ter (C) again reduces the grid frequency until the standard grid frequency with a balanced output level has been reached. if not enough output is pro-vided by the grid inverters (B) to supply the loads (L), the ne-cessary difference comes from the battery inverters (C) in the batteries.

with very large outputs, this kind of Steca aC hybrid sys-tem can also be designed as a three-phase system in order to supply corresponding loads directly. Here the StecaGrid grid inverters (B) provide direct three-phase feeding on the aC side.

The required bi-directional Steca Sinus inverters Steca Xtender (C) can be used in both single-phase and three-phase cases. up to three devices can be connected in parallel per phase. this means that a total of 24 kw per phase is available, with a maximum of 72 kw in three-phase operation.

Diesel generators (G) can be used to produce approx. 100 kW, while grid inverters (B) are used for up to 70 kW. Thus, loads of up to 70 kw can be supplied. the power per phase of the grid inverters must not exceed the rated power of the Steca Xtender(s) in a phase.

SINgLE-pHaSE aND THREE-pHaSE aC HybRID SySTEmS

Key:

A Solar modulesB StecaGrid inverter (single-phase or three-phase)C Hybrid inverter Steca Xtender (XTS, XTM, XTH)D Solar charge controller Steca Power TaromF Wind turbines with inverterG Diesel generatorH BatteryL Electrical load (230 V AC or 400 V AC)


South Africa

Steca xtender allowed in AC-coupled systems

Steca Xtm 3500-24Steca Xtm 4000-48Steca XtH 5000-24Steca XtH 6000-48Steca XtH 8000-48

Observe minimum battery capacity

Steca Tarom mppT 6000Steca Tarom mppT 6000-mmaximum power point Tracker60 A, 12 / 24 / 48 V(page 18)

Steca Xtender XTHHybrid inverter3,000 W - 72,000 W(page 30)

Stecagrid 10000+ 3ph grid inverter10,000 W up to several 1,000,000 W

coolcept, coolcept-120, coolcept-x, coolcept3, coolcept3-xgrid inverter1,800 W up to several 10,000 W

pV grid Connected:

5958 HyBrid SyStemS HyBrid SyStemS

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large-scale power supply failures are becoming increasin-gly common. With emergency systems such as generators or uninterruptible power supplies (UpS), the power supply can be assured.

yet, in the event of a power outage, the grid-connected PV system also stops working. this means that although power may be availa-ble, it cannot be used. the Solsafe system offers a simple, efficient and cost-effective solution to this problem.

installing one of our combined inverters Steca Xtender (XtS, Xtm, XTH) with a battery system turns any grid-connected PV system into an emergency power supply in the event of a power outage. if the public grid is available, the electrical output generated by the so-lar modules is fed directly into the grid by the grid inverter (B) and the grid-feed electricity meter (E). In parallel to this, the unsupplied loads (I) receive power directly from the grid, via the consumption electricity meter (F). The batteries are kept fully charged from the public grid via the hybrid system inverter (C), and, if necessary, they are recharged. Furthermore, the supplied loads (L) receive power directly from the public grid.

If there is a grid outage, the hybrid system inverter (C) automatically switches mode by means of the Steca S-Box (D) to operate as a sine wave inverter, and continues to feed power to the supplied loads (L) without any interruption. Because the grid inverter can no longer supply power to the grid, its output is channelled directly to the sup-plied loads (L). In this way, the loads can receive power directly from the grid inverter of the solar modules. at the same time, the battery can be recharged with the available solar energy, which increases the length of time for which the supplied loads can receive power during the night.

with this set-up, the capacity of the battery can be kept small, allowing for an optimal design of system costs. the Solsafe system is fully automatic, and can be integrated into any new or existing PV system. Solsafe ensures the power supply, and furthermore allows the solar energy to be fully utilised.

Simple wiring with the Steca S-boxthe Steca S-Box offers a professional solution for simple wiring of a Steca Solsafe system. it contains all power switches necessary for implementation. the grid inverters and all inputs and outputs on the Steca Xtender inverters (XTS, XTM and XTH) are connected to the Steca S-Box. this means that installation errors are virtually im-possible.

STECa SOLSaFEblackout - and yet there‘s light!

Key:

A Solar modulesB StecaGrid inverter

(single-phase or three-phase)C Hybrid inverter

Steca Xtender (XTS, XTM, XTH) D Steca S-BoxE Grid-feed electricity meterF Consumption electricity meterH BatteryI Unsupplied loads (230 V AC)K Public gridL Electrical load (230 V AC)


Why choose Steca Solsafe? ∙ it allows great system flexibility. the grid inverter is designed according to the PV generator, and the sine wave inverter according to the desired emergency power supply.

∙ the PV system’s output and operating voltage can be freely selected, and do not depend on the size and battery voltage of the emergency power supply.

∙ it should be noted, however, that the aC output of the grid inverter may never be greater than the rated output of the sine wave inverter.

∙ the PV voltage of the grid inverter does not depend on the battery voltage.

∙ existing grid-connected solar power systems can be fitted with Steca Solsafe without alterations of any kind.

∙ the available PV capacity is added to that of the sine wave inverter in the event of a power outage, or the solar power is stored in the battery.

Steca Xtender XTHHybrid inverter3,000 W - 72,000 W(page 30)

Steca Xtender XTmHybrid inverter1,500 W - 36,000 W(page 30)

Steca Xtender XTSHybrid inverter1,000 W - 12,600 W(page 30)

coolcept, coolcept-120, coolcept-x, coolcept3, coolcept3-xgrid inverter 1,800 W up to several 10,000 W(Steca PV Grid Connected)

Solsafe S-box anti-blackout system for Steca sine wave invertersS-box 25-X (without ENS)S-box 25-X-E (with ENS)

Steca RCC-02Remote control and display(page 39)

Stecagrid 10000+ 3ph grid inverter 10,000 W up to several 1,000,000 W(Steca PV Grid Connected)

not shown:Stecagrid 8000+ 3ph

60 61 SteCa SolSafe SteCa SolSafe

12,6

12,0

11,4

10,8

10,2

9,6

9,0

8,4

0 2,5 5 7,5 10 12,5 15 17,5 20 22,5 25 27,5 30

U [V

]

C [Ah]

100

80 A

60 A

100 A

50 A

40 A

30 A

20 A

15 A

10 A

7.5 A5 A

20 %

40 %

50 %60 %

70 %80 %

90 %

10 %

1 32

0 %

State of Charge (SOC)

Deep Discharge Protection (SOC = 30%)

Constant Discharge Voltage

I = 25 A

Discharge Current

Capacity

Vo

ltag

e o

f b

atte

ry

www.steca.com

What does SoC mean?SoC means the current ‚state of charge‘ of the battery. this is given as a percentage. a battery is fully charged when the SoC is at 100%. the lowest value which can be reached is 0%. in theory, all other va-lues in between can be reached, but most types of batteries should not reach state of charge values of less than 30%. Such values can quickly lead to dangerous deep discharges which decrease the ser-vice life of the batteries or destroy them directly. a battery‘s state of charge should not be confused with its remaining available capacity. the actual remaining capacity depends on many parameters such as the temperature, age and history of the battery and many others. it is possible to gain a rough estimate of a battery‘s current remaining capacity by multiplying the correct state of charge of the battery by its rated capacity. as the age of the battery increases, however, the rated capacity can change significantly, which means that the pre-diction of the available capacity can be strongly distorted.

Why is a state of charge determination so important?during charging, the solar charge controller has to know when the battery is fully charged so that it can protect it against overcharging at the right moment and in the correct manner. when discharging the battery it is equally important to know the state of charge in order to protect the battery against harmful deep discharge. in or-der to carry out this function, there are various criteria which can indicate how full the battery is at a given time. Some of these criteria are better suited than others. the simplest and most common cri-terion is the voltage of the battery. with this method, a fixed charge cut-off voltage is defined. when this voltage is reached, charging is stopped. a fixed deep discharge threshold is also defined. if the battery voltage falls below this value, the load is switched off. this method is simple, since the voltage of the battery is easy to measu-re precisely, yet it is not ideal for most types of batteries because their state of charge does not change in direct proportion to the voltage. low discharge currents are common in solar power systems in particular. this leads to inadequate battery maintenance if fixed voltage values determine the charging or discharging processes. the full-charge and deep-discharge thresholds provide better solutions, for the battery currents are taken into account alongside the voltage. But this method does not allow the state of charge to be determined accurately either, since many important factors are not considered. only if the state of charge is calculated precisely is it possible for the solar charge controller to treat the battery correctly, to end a charge cycle using the solar module at the correct time and to switch off a load neither too early nor not too late. for this reason, Steca has developed a high-performance algorithm with which the state of charge can be calculated with a sufficient degree of accuracy and the battery can be optimally protected.

How does Steca‘s state of charge determination work?Steca‘s algorithm for determining a battery‘s state of charge is a combination of various methods which ensure that the SoC is cal-culated accurately enough and delivers reliable, stable values over a long period of time. furthermore, attention is paid to making a calculation method which can be carried out simply and at a low cost in various solar charge controllers. years of experience in the research and develop ment of battery state of charge algorithms has led to an auto-adaptive ‚fuzzy logic‘ algorithm. this includes the age and usage history of the battery in the calculation as well as the other important parameters. the battery voltage and its cur-rents and the temperature are constantly measured as accurately as possible by the solar charge controller. during a learning phase, the solar charge controller estimates the state of charge on the basis of experience values. at the same time, the controller monitors the be-haviour of the battery and adjusts various parameters to the current system. the learning phase lasts for a few cycles. the advantage of this method is that it makes it possible to respond dynamically to the requirements of the system and individually adjust the battery main-tenance to the requirements of every individual system. this feature explains the high performance and reliability of the Steca battery state of charge algorithm. at the same time, this algorithm guaran-tees optimum battery maintenance, which is reflected in the long service life of the battery. in addition, the user benefits from the fact that the battery‘s current state of charge can be displayed, which means the user constantly has optimal control over the system.

Which chargers from Steca carry the optimised algorithm?the Steca product range is divided into two lines. one is optimised for use in simple applications with less demand and equipped with the minimum necessary features. the other line is designed to cover high-end demand to supply a good communication interface to the user and optimised battery maintenance features. for both lines there exist solar charge controllers in a wide power range. all chargers equipped with the special Steca State of Charge algorithm are marked with the SOC symbol in this catalogue (see overview page 2).

figure above...shows the characteristics of a 12 V lead-acid battery with a rated capacity of 28 ah. its voltage changes in relation to the charge and discharge currents and the state of charge. if a fixed discharge cut-off voltage of 11.1 V is now specified, this means that, at a discharge current of 50 a, a full battery is dis-connected when its state of charge is still 70% (point 1). this is represented in the diagram by the green line. the majority of the capacity which is still available cannot be used in this case.

if the same battery is discharged with 5 a, however, the system disconnects it at the same fixed voltage of 11.1 V, which in this case means at a state of charge of around 10% (point 2).

this is already a dangerously low state of charge which can result in significant damage to the battery. only with a discharge current of 25 a would the battery in this case be correctly disconnected at an SoC of 30% (point 3).

using the Steca state of charge algorithm the charger is able to disconnect the battery at the correct threshold with any discharge current. the cut-off voltage is determined by the point at which the 30% line crosses the discharge current line (Steca SOC deep-discharge protection). Only a method of this kind can ensure that the battery is maintained correctly, and thus has a long service life.

STECa‘S CHaRgINg TECHNOLOgyThe Steca products stand out thanks to an optimal state of charge determination. This is the key to the batteries having a long service life.

62 63 SteCa‘S CHarging teCHnology SteCa‘S CHarging teCHnology

Ubatt [V]

Ubatt [V]

0

0

20

20

40

40

Steca Solsum F Steca Solarix pRS

48

24

12

48

24

12

Imodul [a]

Imodul [a]

10

10

30

30

Ubatt [V]0 10 150

Steca pR0303, 0505

Steca pR 1010 - 3030

Steca pR 2020 Ip

Steca Tarom Steca power Tarom

48

24

12

Imodul [a]50 100

Steca Tarom mppT

Steca Solarix mppTSteca Solarix mppT

Steca Solarix 2020-x2

www.steca.com

SELECTINg THE SOLaR CHaRgE CONTROLLER

basic solar charge controllers

Classic solar charge controllers

advanced solar charge controllers

the solar charge controller is the central component in a stand-alone system. it controls the energy flow in the entire system and deter-mines the system function and service life. this means that a suitable solar charge controller must be selected carefully.

the solar charge controller only accounts for between 3 % and 5 % of the total cost of a stand-alone system, and yet it is the most important component. a high-quality, reliable solar charge control-ler in a higher price class pays for itself very quickly, as it increases the battery life and thus leads to a significant saving in system costs.

Selecting the topologySteca solar charge controllers are available as professional hybrid-shunt controllers, serial charge controllers or mPP trackers. a suita-ble topology should be selected depending on the requirements of the application.

Switch charge controllers such as shunt and serial charge control-lers can only be used on 12 V systems in connection with 36-cell solar modules. on 24 V or 48 V systems, two 36-cell solar modules (24 V) or two 72-cell solar modules (48 V) must be wired serially as a string.

Serial charge controllers are well suited to small applications and solar home systems. Shunt controllers are recommended for larger-scale applications and hybrid systems, as these have a lower power loss during charging.

due to their good electromagnetic compatibility, shunt controllers are also recommended for use in telecommunication applications.

a solar charge controller with mPP tracking must be used when solar modules which are not comprised of 36 or 72 cells are used. these include most optimised solar modules for grid-connected sys-tems and all thin-film modules.

the use of an mPP tracker is also increasingly recommended de-pending on the coldness of the average annual temperature and importance of efficient charging at low battery charges (even when standard 36-cell modules are used).

dimensioning the solar charge controllerthe short-circuit current (isc) of the solar module is decisive when dimensioning solar charge controllers (under standard test condi-tions). Steca recommends always dimensioning the solar charge controller generously. the rated current on the solar charge control-ler should be approximately 20 % higher than the total short-circuit current on all connected solar modules.

User interfaceif the solar charge controller is used in an application where persons have access to the system, it is important that the controller is equip-ped with a large lCd screen for displaying the operating statuses using symbols. the solar charge controller should be equipped with an integrated energy meter for notifying the user of the system and its operation.

On pure technical systems (such as night-light systems), a solar charge controller with a simple led display is sufficient.

Cables and designin order to ensure a long service life, it is important to use a ro-bust solar charge controller with short, thick cables for connecting it to the battery. the device should always be screwed to a non-flammable wall directly above the battery. it is important that there is enough free space around the solar charge controller so that it can be cooled sufficiently by the ambient air. the guidelines in the instruction manuals must be adhered to in all cases.

Additional functionsit makes sense to use solar charge controllers with additional func-tions in applications with stand-alone inverters or hybrid systems. the possibility of connecting to the stand-alone inverters for com-munication and synchronisation of the devices is a requirement for effective inverter systems or hybrid systems. Special energy manage-ment functions remain of key importance on hybrid systems.

gENERaL RECOmmENDaTIONSSelecting the solar controller

64 65 SeleCtion Solar CHarge Controller SeleCtion Solar CHarge Controller

12V

24V

48V

www.steca.com

max. pV power for a 12 V

battery


battery


batterySteca Solarix mPPt 1010 125 w 250 w -

Steca Solarix mPPt 2010 250 w 500 w -

Steca tarom mPPt 6000 850 w 1.700 w 3.400 w

Steca tarom mPPt 6000-m 850 w 1.700 w 3.400 w

overview of Steca mPPt charge controller rated output

bat

tery

vo

ltag

e

nu

mb

er o

f m

od

ule

s in

se

ries

per

str

ing number of module strings connected in parallel

1 2 3 4 5

48 V

1 - - - - -

2 - - - - -

3 723 wp (3 modules)

1,445 wp(6 modules)

2,168 wp(9 modules)

2,891 wp(12 modules)


4 964 wp(4 modules)

1,927 wp(8 modules)



-

24 V

1 - - - - -

2 482 wp(2 modules)

964 wp(4 modules)

1,445 wp(6 modules)

1,927 wp(8 modules)

-

3 723 wp(3 modules)

1,445 wp(6 modules)

- - -

4 964 wp(4 modules)

1,927 wp(8 modules)

- - -

12 V

1 241 wp(1 module)

482 wp(2 modules)

723 wp(3 modules)

964 wp(4 modules)

1,204 wp(5 modules)

2 482 wp(2 modules)

964 wp(4 modules)

- - -

3 723 wp(3 modules)

- - - -

4 964 wp(4 modules)

- - - -

Permitted configurations for one input Permitted configurations for both inputs connected in parallel Configurations not permitted

USE aND CONFIgURaTION OF mpp TRaCKERS

When is the use of an mppT charge controller recommen-ded?there are essentially three situations where we recommend selecting an mPPt charge controller (maximum Power Point tracker) like the Steca Solarix mPPt or tarom mPPt rather than a conventional Pwm charge controller (Pulse width modulation) like the Steca Solsum, PrS, Pr, tarom or Power tarom.

• Situation 1: 36 or 72-cell crystalline PV modules are not used36-cell modules (for 12 V systems) have MPP voltages of around 17 V and open circuit voltages close to 21 V. 72-cell modules for 24 V systems have double this voltage – i.e. roughly 34 Vmpp and 42 Voc. PV modules which are conventionally used in grid-connected PV systems with e.g. 60 cells (usually around 30 Vmpp) are not suitable for 12 / 24 / 48 V systems with regular Pwm charge controllers. an mPPt charge controller must be used here to attain optimal efficiency values. this controller type can convert higher PV voltages into lower battery voltages – with minimal losses.

• Situation 2: Battery frequently low if configuration of the solar energy system is tight or the bat-tery is frequently at low voltage over long periods of time, an mPPt charge controller can provide more energy. in such ca-ses the mPP tracker, in contrast to the switching charge cont-roller, can convert the voltage difference between the battery and the solar module into additional charge current. in this way the energy yield can be increased when battery voltage is low.

• Situation 3: low average temperatures and severe wintersthe colder the crystalline PV modules become, the higher the optimal working voltage (MPP or Maximum Power Point) will be. due to their variable PV module voltage, mPPt charge con-trollers can adapt to this situation and convert the high voltage into a higher charge current.

if the ground is covered with snow, background radiation of the environment will be significantly higher due to the irradia-tion being reflected on the snow. the power of the solar mo-dules therefore increases, resulting in a higher battery charge current due to the mPPt charge controller.

for installations which are in operation throughout the year, it is im-portant to maximise the energy yield in the months with the least sunlight. it is precisely here that the Steca mPPt charge controller can provide added value.

Which criteria need to be observed when configuring mppT charge controllers?in order to select the correct mPPt charge controller, the following data must be known: the input voltage of the PV modules (uoc), the maximum power voltage (umpp), the total output of the PV modules (in Wp) and the battery voltage (12 V, 24 V or 48 V) and temperature coefficient (VoC).

• PV input voltage (uoc)the open circuit voltage of the entire module array (uoc) that oc-curs during the lowest possible ambient temperature must never exceed the mPPt charge controller‘s maximum input voltage. if it does, this will destroy the charge controller.

• maximum power voltage (umpp)the maximum power voltage of the module string (umpp) must never fall below the minimum input voltage of the mPPt charge controller when the maximum ambient temperature occurs. the mPP voltage must be above the maximum battery voltage at all times – regardless of the temperature conditions and conse-quently at maximum ambient temperature too. for systems with a 12 V battery, this corresponds to an mPP voltage of at least 17 Vmpp; with use of a 24 V battery this will accordingly be at least 28 Vmpp and in case of a 48 V battery at least 56 Vmpp.

• Total output of the PV modules (Wp)The total output of the PV modules (in Wp) when connected should be less than or equal to the mPPt charge controller‘s rated power. although module arrays with higher powers can be connected up without the Steca mPPt charge controller being destroyed, the actual charge capacity will then be limited to the charge controller‘s rated capacity. in practice, a module array that is oversized by up to 20 percent may be a good idea as the peak power (Wp) is only attained at very low temperatures, in strong sunlight and with clear skies. the module data is spe-cified under „Standard Test Conditions“ (STC) at 25 °C. In real application situations, the cell temperature will be significantly higher however. this leads to a lower output power – regardless of which charge controller is used.

• note on efficiencythe lower the voltage difference between the current PV input voltage and the battery voltage, the higher the mPP tracker‘s rate of efficiency will be. this is true for all mPPt charge con-trollers, regardless of the manufacturer.

• Battery voltagethe battery voltage is selected depending on the power of the consumers. it is generally a good idea to select a battery voltage that is as high as possible to keep the current low and hence save costs.

EXampLE CONFIgURaTION OF aN mpp TRaCKER

input voltage, calculation of maximum string length

Modules≤Umaxcharge controller

Uocmodules · 1+ βVoc ·(T ambientmin−T STC )

Modules≥Umincharge controller

Umppmodules · 1+ βVoc ·(Tambientmax−T STC )

Modules *≤P nomcharge controller · (1+DimFactor )

P max−mppmodules

minimum mpp voltageModules≤

Umaxcharge controller





P max−mppmodules

Total output

Modules≤Umaxcharge controller





P max−mppmodules

uoCmodule [V]: open circuit voltage VoC [%/k]: temperature coefficient of open circuit voltageumppmodule [V]: mPP voltage of solar moduleumin/maxcharge controller [V]: minimum/maximum input voltage of charge controller tambientmin/max [°C]: minimum/maximum ambient temperaturePnomcharge controller [w]: rated power of charge controllerPmax-mppmodule [wp]: rated solar module power at StCdimfactor [%]: overdimensioning factortStC [°C]: 25 °C* the maximum number of modules per string from calculation no.1 (maximum string length) may not be exceeded, even if the charge controller‘s capacity allows more modules. in this case several strings will have to be connected in parallel.to illustrate this better, a concrete example with certain conditions can be found below:• Solar module (typical module for PV grid feeding with

60 cells)open circuit voltage uoc: 37.6 V temperature coefficient of open circuit voltage: -0.3 % / k mPP voltage umpp: 31.2 VPeak performance: 250 wpmodule current impp bzw. isc: 8.0 / 8.5 aSpecifications with StC = 25 °C

• Battery: 48 Vminimum mPP voltage of solar modules: 56 V

• Charge controller: Steca Tarom MPPT 6000maximum open circuit voltage uoc < 200 Vrated power by 48 V: 3,600 w

• Boundary conditions:temperature range: -30 °C bis +90 °Coverdimensioning of solar modules: 15 %

the specifications for the module and charge controller requirements result in the following criteria:

input voltage, calculation of maximum string lengtha maximum of 4 modules can be connected in series:

Modules

Modules

Modules

≤200 V

37.6 V · 1+ -0.3/100 · (-30 °C -25 °C)

≥56 V

*≤ 3,600 W · 1.15250 Wp

( )

31.2 V · 1+ -0.3/100 · (90 °C - 25 °C)( )

≤ 4.56

≥ 2.23

≤ 16,56

minimum mpp voltageat least 3 modules have to be connected in series:Modules

Modules

Modules

≤200 V

37.6 V · 1+ -0.3/100 · (-30 °C -25 °C)

≥56 V

*≤ 3,600 W · 1.15250 Wp

( )

31.2 V · 1+ -0.3/100 · (90 °C - 25 °C)( )

≤ 4.56

≥ 2.23

≤ 16,56

Total outputa maximum of 16 solar modules can therefore be used with the charge controller:

Modules

Modules

Modules

≤200 V

37.6 V · 1+ -0.3/100 · (-30 °C -25 °C)

≥56 V

*≤ 3,600 W · 1.15250 Wp

( )

31.2 V · 1+ -0.3/100 · (90 °C - 25 °C)( )

≤ 4.56

≥ 2.23

≤ 16,56

66 67 SeleCtion mPPt CHarge Controller SeleCtion mPPt CHarge Controller

(V)100 500 1,000 2,000 5,000 10.000

Steca aJ Steca pLI Steca Solarix pI

48

24

12

(W aC)

Steca XpC

Steca Xtender XTS

Steca Xtender XTm

Steca Xtender XTH

1,000 2,000 3,000 5,000 (W aC) 100,00010,000 20,000 50,000

48

24

12

(V)

www.steca.com

INVERTER SELECTION

Inverters

Inverters with battery chargers

Sine wave invertersin contrast to so-called square wave or trapezoidal inverters (grey square curve), Steca sine wave inverters produce a real and precisely controlled sine wave (red sine wave) at their output. The sine wave inverters assure that all loads which are suitable for grid operation can also be operated on a solar home system without any problems. furthermore, they offer the advantage that no significant noises are produced in the inverter and there is no loud background noise to be heard on a connected radio, for example.

Selecting an inverterthe power of the inverter must be selected according to the way it will be used. the sum of the power of all loads must not exceed the rated power of the inverter. the maximum power of the inverter must be able to cover the starting currents of the loads.

in order to allow the connection of more loads, Steca recom-mends overdimensioning the inverter.

Selecting the pV generator and solar charge controller the solar module array has to be adjusted to the local sunlight con-ditions and the system‘s energy requirement. in order to avoid stag-nation times, the PV generator must also provide enough power during months with little solar radiation in order to cover the requi-rement of the connected loads.

the chosen solar charge controller must also be suitable for the maximum short-circuit current of the PV generator and the maxi-mum load current. in some applications, however, technical proper-ties also play an important role in the choice of solar charge control-ler. this may mean that a high-performance solar charge controller with corresponding additional functions is used in a system with a low output.

in order to keep the initial investment small, we recommend planning the size of the PV generator and battery according to the current energy consumption and choosing a solar charge controller which will allow the system to be expanded later.

Selecting the batteryin order to also be able to supply loads with high requirements with-out any problems, the size of the battery must be chosen with care. Some critical loads such as fridges, freezers, pumps and motors need extremely high starting currents in their start-up phases. in order to be able to power such loads, it is important to use a high-performance inverter with a high overload capacity, particularly in the start-up phase. the battery must also possess a large enough capacity so that sufficient currents are made available to the inver-ter in the start-up phase. we recommend choosing the battery size according to the following formula: the battery capacity should be at least five times as large as the rated power of the inverter divided by the rated voltage of the battery.

Cbatt ≥ 5 h * Pnom / Unom

Pnom is the rated power of the inverter in watts and unom is the rated voltage of the battery.

Selecting the system voltagethe power requirement of the loads should be the decisive factor when choosing the system voltage. the higher the power, the higher the system voltage. if no 12 V dC loads are connected to the system, a higher system voltage of 24 V or 48 V should be chosen in order to reduce the alternating currents, and thus the losses on the dC side. inverters also generally work more effectively with a higher input voltage. all in all, a higher system voltage leads to the system having a greater efficiency, since losses are reduced

Cable lengths and cross sectionsdirect currents in inverter systems are typically large. for this reason, it is important to dimension the cables between the battery and the inverter appropriately. always connect the inverter directly to the battery. the cable you use should be as short as possible. in addition, the cable cross section should match the expected flow of current. in case of doubt, a thicker cable should be chosen. this can have a significant influence on the overall behaviour of the system. using thick and short cables can limit losses and thus allow you to create a system with a better level of efficiency and/or better performance.

if the cables on the direct current side of the inverter are included in the delivery, these should not be lengthened, and a smaller cross section should not be used.

gENERaL RECOmmENDaTIONSfor alternating current and hybrid systems

pnom inverter Unom battery battery capacity

200 w 12 V > 100 ah

500 w 12 V > 200 ah

1,000 w 12 V > 400 ah

2,000 w 12 V > 800 ah

2,000 w 24 V > 400 ah

3,500 w 24 V > 700 ah

3,500 w 48 V > 350 ah

5,000 w 48 V > 500 ah

7,000 w 48 V > 700 ah

Square wave

Sine wave

68 69 SeleCtion inVerter SeleCtion inVerter

www.steca.com

otHer ProduCt areaS

Steca has long stood for ideas and innovations as an electronic manufacturing services (EMS) provider and manufacturer of Steca brand product lines in solar electronics and battery charging systems. as a leading supplier of products for the solar electronics industry, Steca sets the international standard for the regulation and control of solar energy systems. in the three market segments PV grid connected, PV off grid and Solar thermal, the Steca brand is synonymous with innovation and vision. in conception, development, production and marketing, the company is committed to the highest quality standards.

»SteCa Solar eleCtroniCS ProduCtS and SolutionS for an eCologiCal future.«

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STORAGEREADY

98.6 %peak effiency

98.6 %peak efficiency

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Heating and domestic hot water controllers

System controllers

pV gRID CONNECTED

1-pHaSE

33

-pHaSE

-pHaSE

Commercial systems

Residential systems – Single-phase inverters

Residential systems – Three-phase inverters

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Quality

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pV OFF gRID - Iris Hellas

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